42621931 has 8 divisors (see below), whose sum is σ = 47996928. Its totient is φ = 37497000.

The previous prime is 42621923. The next prime is 42621949. The reversal of 42621931 is 13912624.

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

It is a cyclic number.

It is not a de Polignac number, because 42621931 - 2³ = 42621923 is a prime.

It is a super-2 number, since 2×42621931² = 3633258004337522, which contains 22 as substring.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 42621931.

It is not an unprimeable number, because it can be changed into a prime (42621031) 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, 62155 + ... + 62836.

It is an arithmetic number, because the mean of its divisors is an integer number (5999616).

Almost surely, 2^42621931 is an apocalyptic number.

42621931 is a deficient number, since it is larger than the sum of its proper divisors (5374997).

42621931 is a wasteful number, since it uses less digits than its factorization.

42621931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125033.

The product of its digits is 2592, while the sum is 28.

The square root of 42621931 is about 6528.5473882021. The cubic root of 42621931 is about 349.3100175481.

The spelling of 42621931 in words is "forty-two million, six hundred twenty-one thousand, nine hundred thirty-one".