64265821 has 8 divisors (see below), whose sum is σ = 67140864. Its totient is φ = 61440960.

The previous prime is 64265813. The next prime is 64265857. The reversal of 64265821 is 12856246.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 64265821 - 2³ = 64265813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64266821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9916 + ... + 15061.

It is an arithmetic number, because the mean of its divisors is an integer number (8392608).

Almost surely, 2^64265821 is an apocalyptic number.

It is an amenable number.

64265821 is a deficient number, since it is larger than the sum of its proper divisors (2875043).

64265821 is a wasteful number, since it uses less digits than its factorization.

64265821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25091.

The product of its digits is 23040, while the sum is 34.

The square root of 64265821 is about 8016.5965970604. The cubic root of 64265821 is about 400.5530287955.

The spelling of 64265821 in words is "sixty-four million, two hundred sixty-five thousand, eight hundred twenty-one".