42565319 has 4 divisors (see below), whose sum is σ = 42582120. Its totient is φ = 42548520.

The previous prime is 42565309. The next prime is 42565321. The reversal of 42565319 is 91356524.

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

It is a cyclic number.

It is not a de Polignac number, because 42565319 - 2¹² = 42561223 is a prime.

It is a super-2 number, since 2×42565319² = 3623612763143522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42565309) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3737 + ... + 9954.

It is an arithmetic number, because the mean of its divisors is an integer number (10645530).

Almost surely, 2^42565319 is an apocalyptic number.

42565319 is a deficient number, since it is larger than the sum of its proper divisors (16801).

42565319 is a wasteful number, since it uses less digits than its factorization.

42565319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16800.

The product of its digits is 32400, while the sum is 35.

The square root of 42565319 is about 6524.2102204022. The cubic root of 42565319 is about 349.1552935983.

The spelling of 42565319 in words is "forty-two million, five hundred sixty-five thousand, three hundred nineteen".