64252865 has 4 divisors (see below), whose sum is σ = 77103444. Its totient is φ = 51402288.

The previous prime is 64252861. The next prime is 64252871. The reversal of 64252865 is 56825246.

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 27867841 + 36385024 = 5279^2 + 6032^2 .

It is a cyclic number.

It is not a de Polignac number, because 64252865 - 2² = 64252861 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64252861) 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, 6425282 + ... + 6425291.

It is an arithmetic number, because the mean of its divisors is an integer number (19275861).

Almost surely, 2^64252865 is an apocalyptic number.

It is an amenable number.

64252865 is a deficient number, since it is larger than the sum of its proper divisors (12850579).

64252865 is a wasteful number, since it uses less digits than its factorization.

64252865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12850578.

The product of its digits is 115200, while the sum is 38.

The square root of 64252865 is about 8015.7884827383. The cubic root of 64252865 is about 400.5261098011.

The spelling of 64252865 in words is "sixty-four million, two hundred fifty-two thousand, eight hundred sixty-five".