42620531 has 2 divisors, whose sum is σ = 42620532. Its totient is φ = 42620530.

The previous prime is 42620527. The next prime is 42620537. The reversal of 42620531 is 13502624.

42620531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42620531 - 2² = 42620527 is a prime.

It is a super-2 number, since 2×42620531² = 3633019325443922, which contains 22 as substring.

It is a Chen prime.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 42620497 and 42620506.

It is not a weakly prime, because it can be changed into another prime (42620537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21310265 + 21310266.

It is an arithmetic number, because the mean of its divisors is an integer number (21310266).

Almost surely, 2^42620531 is an apocalyptic number.

42620531 is a deficient number, since it is larger than the sum of its proper divisors (1).

42620531 is an equidigital number, since it uses as much as digits as its factorization.

42620531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 42620531 is about 6528.4401659202. The cubic root of 42620531 is about 349.3061929178.

The spelling of 42620531 in words is "forty-two million, six hundred twenty thousand, five hundred thirty-one".