42631539 has 16 divisors (see below), whose sum is σ = 57816192. Its totient is φ = 27937728.

The previous prime is 42631531. The next prime is 42631583. The reversal of 42631539 is 93513624.

42631539 = 422² + 423² + ... + 587².

It is not a de Polignac number, because 42631539 - 2³ = 42631531 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42631531) 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 15 ways as a sum of consecutive naturals, for example, 77664 + ... + 78210.

It is an arithmetic number, because the mean of its divisors is an integer number (3613512).

Almost surely, 2^42631539 is an apocalyptic number.

42631539 is a deficient number, since it is larger than the sum of its proper divisors (15184653).

42631539 is a wasteful number, since it uses less digits than its factorization.

42631539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 946.

The product of its digits is 19440, while the sum is 33.

The square root of 42631539 is about 6529.2831918979. The cubic root of 42631539 is about 349.3362631796.

The spelling of 42631539 in words is "forty-two million, six hundred thirty-one thousand, five hundred thirty-nine".