42620965 has 4 divisors (see below), whose sum is σ = 51145164. Its totient is φ = 34096768.

The previous prime is 42620959. The next prime is 42620987. The reversal of 42620965 is 56902624.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5447556 + 37173409 = 2334^2 + 6097^2 .

It is a cyclic number.

It is not a de Polignac number, because 42620965 - 2¹⁵ = 42588197 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42620965.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4262092 + ... + 4262101.

It is an arithmetic number, because the mean of its divisors is an integer number (12786291).

Almost surely, 2^42620965 is an apocalyptic number.

It is an amenable number.

42620965 is a deficient number, since it is larger than the sum of its proper divisors (8524199).

42620965 is an equidigital number, since it uses as much as digits as its factorization.

42620965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8524198.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 42620965 is about 6528.4734050159. The cubic root of 42620965 is about 349.3073785621.

The spelling of 42620965 in words is "forty-two million, six hundred twenty thousand, nine hundred sixty-five".