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104420143 = 195495797
BaseRepresentation
bin1100011100101…
…01001100101111
321021111002111201
412032111030233
5203212421033
614210030331
72405361622
oct616251457
9237432451
10104420143
1153a40443
122ab783a7
1318830689
14dc21db9
15927947d
hex639532f

104420143 has 4 divisors (see below), whose sum is σ = 109915960. Its totient is φ = 98924328.

The previous prime is 104420111. The next prime is 104420177. The reversal of 104420143 is 341024401.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 341024401 = 509669989.

It is a cyclic number.

It is not a de Polignac number, because 104420143 - 25 = 104420111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 5495797 = 104420143 / (1 + 0 + 4 + 4 + 2 + 0 + 1 + 4 + 3).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 104420143.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (104427143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2747880 + ... + 2747917.

It is an arithmetic number, because the mean of its divisors is an integer number (27478990).

Almost surely, 2104420143 is an apocalyptic number.

104420143 is a deficient number, since it is larger than the sum of its proper divisors (5495817).

104420143 is an equidigital number, since it uses as much as digits as its factorization.

104420143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5495816.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 104420143 is about 10218.6174700886. The cubic root of 104420143 is about 470.8993538733.

Adding to 104420143 its reverse (341024401), we get a palindrome (445444544).

The spelling of 104420143 in words is "one hundred four million, four hundred twenty thousand, one hundred forty-three".

Divisors: 1 19 5495797 104420143