64260921 has 8 divisors (see below), whose sum is σ = 85722624. Its totient is φ = 42819920.

The previous prime is 64260863. The next prime is 64260929. The reversal of 64260921 is 12906246.

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 64260921 - 2¹⁸ = 63998777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64260929) 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, 4840 + ... + 12326.

It is an arithmetic number, because the mean of its divisors is an integer number (10715328).

Almost surely, 2^64260921 is an apocalyptic number.

It is an amenable number.

64260921 is a deficient number, since it is larger than the sum of its proper divisors (21461703).

64260921 is a wasteful number, since it uses less digits than its factorization.

64260921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10351.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 64260921 is about 8016.2909752578. The cubic root of 64260921 is about 400.5428483725.

The spelling of 64260921 in words is "sixty-four million, two hundred sixty thousand, nine hundred twenty-one".