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105140645 = 547541827
BaseRepresentation
bin1100100010001…
…01000110100101
321022211200211222
412101011012211
5203404000040
614233310125
72414452331
oct621050645
9238750758
10105140645
11543927a5
122b265345
1318a235cc
14dd6c7c1
15936cbb5
hex64451a5

105140645 has 16 divisors (see below), whose sum is σ = 129247488. Its totient is φ = 82071360.

The previous prime is 105140639. The next prime is 105140647. The reversal of 105140645 is 546041501.

It is a de Polignac number, because none of the positive numbers 2k-105140645 is a prime.

It is a super-2 number, since 2×1051406452 = 22109110462032050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (105140647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126722 + ... + 127548.

It is an arithmetic number, because the mean of its divisors is an integer number (8077968).

Almost surely, 2105140645 is an apocalyptic number.

It is an amenable number.

105140645 is a deficient number, since it is larger than the sum of its proper divisors (24106843).

105140645 is an equidigital number, since it uses as much as digits as its factorization.

105140645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1420.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 105140645 is about 10253.8112426551. The cubic root of 105140645 is about 471.9799453439.

The spelling of 105140645 in words is "one hundred five million, one hundred forty thousand, six hundred forty-five".