42862591 has 2 divisors, whose sum is σ = 42862592. Its totient is φ = 42862590.

The previous prime is 42862579. The next prime is 42862619. The reversal of 42862591 is 19526824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42862591 - 2¹⁵ = 42829823 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42862591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42862511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21431295 + 21431296.

It is an arithmetic number, because the mean of its divisors is an integer number (21431296).

Almost surely, 2^42862591 is an apocalyptic number.

42862591 is a deficient number, since it is larger than the sum of its proper divisors (1).

42862591 is an equidigital number, since it uses as much as digits as its factorization.

42862591 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 37.

The square root of 42862591 is about 6546.9528026403. The cubic root of 42862591 is about 349.9662307555.

The spelling of 42862591 in words is "forty-two million, eight hundred sixty-two thousand, five hundred ninety-one".