42656257 has 8 divisors (see below), whose sum is σ = 49182336. Its totient is φ = 36238272.

The previous prime is 42656249. The next prime is 42656261. The reversal of 42656257 is 75265624.

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

It is not a de Polignac number, because 42656257 - 2³ = 42656249 is a prime.

It is a super-2 number, since 2×42656257² = 3639112522500098, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42656267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26173 + ... + 27754.

It is an arithmetic number, because the mean of its divisors is an integer number (6147792).

Almost surely, 2^42656257 is an apocalyptic number.

It is an amenable number.

42656257 is a deficient number, since it is larger than the sum of its proper divisors (6526079).

42656257 is a wasteful number, since it uses less digits than its factorization.

42656257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54047.

The product of its digits is 100800, while the sum is 37.

The square root of 42656257 is about 6531.1757746978. The cubic root of 42656257 is about 349.4037658286.

The spelling of 42656257 in words is "forty-two million, six hundred fifty-six thousand, two hundred fifty-seven".