42556829 has 4 divisors (see below), whose sum is σ = 48636384. Its totient is φ = 36477276.

The previous prime is 42556823. The next prime is 42556841. The reversal of 42556829 is 92865524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42556829 - 2²⁰ = 41508253 is a prime.

It is a super-2 number, since 2×42556829² = 3622167389070482, 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 (42556823) 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, 3039767 + ... + 3039780.

It is an arithmetic number, because the mean of its divisors is an integer number (12159096).

Almost surely, 2^42556829 is an apocalyptic number.

It is an amenable number.

42556829 is a deficient number, since it is larger than the sum of its proper divisors (6079555).

42556829 is an equidigital number, since it uses as much as digits as its factorization.

42556829 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6079554.

The product of its digits is 172800, while the sum is 41.

The square root of 42556829 is about 6523.5595344873. The cubic root of 42556829 is about 349.1320780978.

The spelling of 42556829 in words is "forty-two million, five hundred fifty-six thousand, eight hundred twenty-nine".