42556017 has 16 divisors (see below), whose sum is σ = 64945152. Its totient is φ = 24281040.

The previous prime is 42556001. The next prime is 42556037. The reversal of 42556017 is 71065524.

It is not a de Polignac number, because 42556017 - 2⁴ = 42556001 is a prime.

It is a super-2 number, since 2×42556017² = 3622029165808578, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42556037) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19348 + ... + 21434.

It is an arithmetic number, because the mean of its divisors is an integer number (4059072).

Almost surely, 2^42556017 is an apocalyptic number.

It is an amenable number.

42556017 is a deficient number, since it is larger than the sum of its proper divisors (22389135).

42556017 is a wasteful number, since it uses less digits than its factorization.

42556017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3068.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 42556017 is about 6523.4972982289. The cubic root of 42556017 is about 349.1298575607.

The spelling of 42556017 in words is "forty-two million, five hundred fifty-six thousand, seventeen".