42656913 has 24 divisors (see below), whose sum is σ = 66585792. Its totient is φ = 26159328.

The previous prime is 42656879. The next prime is 42656917. The reversal of 42656913 is 31965624.

It is a happy number.

It is not a de Polignac number, because 42656913 - 2⁶ = 42656849 is a prime.

It is a super-2 number, since 2×42656913² = 3639224453379138, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (42656917) 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 23 ways as a sum of consecutive naturals, for example, 51420 + ... + 52242.

It is an arithmetic number, because the mean of its divisors is an integer number (2774408).

Almost surely, 2^42656913 is an apocalyptic number.

It is an amenable number.

42656913 is a deficient number, since it is larger than the sum of its proper divisors (23928879).

42656913 is a wasteful number, since it uses less digits than its factorization.

42656913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285 (or 1282 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 42656913 is about 6531.2259951712. The cubic root of 42656913 is about 349.4055569507.

The spelling of 42656913 in words is "forty-two million, six hundred fifty-six thousand, nine hundred thirteen".