105139857 has 8 divisors (see below), whose sum is σ = 140235040. Its totient is φ = 70068960.

The previous prime is 105139847. The next prime is 105139861. The reversal of 105139857 is 758931501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 105139857 - 2⁴ = 105139841 is a prime.

It is a super-2 number, since 2×105139857² = 22108779059960898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105139847) 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 7 ways as a sum of consecutive naturals, for example, 10482 + ... + 17892.

It is an arithmetic number, because the mean of its divisors is an integer number (17529380).

Almost surely, 2^105139857 is an apocalyptic number.

It is an amenable number.

105139857 is a deficient number, since it is larger than the sum of its proper divisors (35095183).

105139857 is an equidigital number, since it uses as much as digits as its factorization.

105139857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12143.

The product of its (nonzero) digits is 37800, while the sum is 39.

The square root of 105139857 is about 10253.7728178461. The cubic root of 105139857 is about 471.9787662214.

The spelling of 105139857 in words is "one hundred five million, one hundred thirty-nine thousand, eight hundred fifty-seven".