42565345 has 4 divisors (see below), whose sum is σ = 51078420. Its totient is φ = 34052272.

The previous prime is 42565337. The next prime is 42565357. The reversal of 42565345 is 54356524.

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 12873744 + 29691601 = 3588^2 + 5449^2 .

It is a cyclic number.

It is not a de Polignac number, because 42565345 - 2³ = 42565337 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42565345.

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, 4256530 + ... + 4256539.

It is an arithmetic number, because the mean of its divisors is an integer number (12769605).

Almost surely, 2^42565345 is an apocalyptic number.

It is an amenable number.

42565345 is a deficient number, since it is larger than the sum of its proper divisors (8513075).

42565345 is an equidigital number, since it uses as much as digits as its factorization.

42565345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8513074.

The product of its digits is 72000, while the sum is 34.

The square root of 42565345 is about 6524.2122129802. The cubic root of 42565345 is about 349.1553646893.

The spelling of 42565345 in words is "forty-two million, five hundred sixty-five thousand, three hundred forty-five".