42634531 has 2 divisors, whose sum is σ = 42634532. Its totient is φ = 42634530.

The previous prime is 42634523. The next prime is 42634541. The reversal of 42634531 is 13543624.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42634531 - 2³ = 42634523 is a prime.

It is a super-2 number, since 2×42634531² = 3635406467179922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42634531.

It is not a weakly prime, because it can be changed into another prime (42634511) 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 as a sum of consecutive naturals, namely, 21317265 + 21317266.

It is an arithmetic number, because the mean of its divisors is an integer number (21317266).

Almost surely, 2^42634531 is an apocalyptic number.

42634531 is a deficient number, since it is larger than the sum of its proper divisors (1).

42634531 is an equidigital number, since it uses as much as digits as its factorization.

42634531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8640, while the sum is 28.

The square root of 42634531 is about 6529.5123095067. The cubic root of 42634531 is about 349.3444354520.

The spelling of 42634531 in words is "forty-two million, six hundred thirty-four thousand, five hundred thirty-one".