105442057 has 12 divisors (see below), whose sum is σ = 124810816. Its totient is φ = 87257520.

The previous prime is 105442033. The next prime is 105442087. The reversal of 105442057 is 750244501.

It is a de Polignac number, because none of the positive numbers 2^k-105442057 is a prime.

It is a super-2 number, since 2×105442057² = 22236054768782498, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (105442087) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3069 + ... + 14842.

Almost surely, 2^105442057 is an apocalyptic number.

It is an amenable number.

105442057 is a deficient number, since it is larger than the sum of its proper divisors (19368759).

105442057 is an equidigital number, since it uses as much as digits as its factorization.

105442057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17976 (or 17947 counting only the distinct ones).

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 105442057 is about 10268.4982835856. The cubic root of 105442057 is about 472.4305312985.

Adding to 105442057 its reverse (750244501), we get a palindrome (855686558).

The spelling of 105442057 in words is "one hundred five million, four hundred forty-two thousand, fifty-seven".