42580939 has 2 divisors, whose sum is σ = 42580940. Its totient is φ = 42580938.

The previous prime is 42580927. The next prime is 42580991. The reversal of 42580939 is 93908524.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42580939 is a prime.

It is a super-2 number, since 2×42580939² = 3626272732243442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42580039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21290469 + 21290470.

It is an arithmetic number, because the mean of its divisors is an integer number (21290470).

Almost surely, 2^42580939 is an apocalyptic number.

42580939 is a deficient number, since it is larger than the sum of its proper divisors (1).

42580939 is an equidigital number, since it uses as much as digits as its factorization.

42580939 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 40.

The square root of 42580939 is about 6525.4071903598. The cubic root of 42580939 is about 349.1979976809.

The spelling of 42580939 in words is "forty-two million, five hundred eighty thousand, nine hundred thirty-nine".