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BaseRepresentation
bin1011111011111…
…00100110101111
320222101212211011
411331330212233
5201113000403
613534010051
72324022631
oct575744657
9228355734
10100125103
1151577521
1229646927
1317988730
14d424a51
158bcba6d
hex5f7c9af

100125103 has 4 divisors (see below), whose sum is σ = 107827048. Its totient is φ = 92423160.

The previous prime is 100125083. The next prime is 100125127. The reversal of 100125103 is 301521001.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301521001 = 1636318427.

It is a cyclic number.

It is not a de Polignac number, because 100125103 - 213 = 100116911 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 7701931 = 100125103 / (1 + 0 + 0 + 1 + 2 + 5 + 1 + 0 + 3).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100125203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3850953 + ... + 3850978.

It is an arithmetic number, because the mean of its divisors is an integer number (26956762).

Almost surely, 2100125103 is an apocalyptic number.

100125103 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

100125103 is a deficient number, since it is larger than the sum of its proper divisors (7701945).

100125103 is an equidigital number, since it uses as much as digits as its factorization.

100125103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7701944.

The product of its (nonzero) digits is 30, while the sum is 13.

The square root of 100125103 is about 10006.2531948777. The cubic root of 100125103 is about 464.3523615973.

Adding to 100125103 its reverse (301521001), we get a palindrome (401646104).

The spelling of 100125103 in words is "one hundred million, one hundred twenty-five thousand, one hundred three".

Divisors: 1 13 7701931 100125103