64270921 has 16 divisors (see below), whose sum is σ = 75741120. Its totient is φ = 53766720.

The previous prime is 64270919. The next prime is 64270937. The reversal of 64270921 is 12907246.

64270921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 64270921 - 2¹ = 64270919 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64270321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72346 + ... + 73228.

It is an arithmetic number, because the mean of its divisors is an integer number (4733820).

Almost surely, 2^64270921 is an apocalyptic number.

It is an amenable number.

64270921 is a deficient number, since it is larger than the sum of its proper divisors (11470199).

64270921 is a wasteful number, since it uses less digits than its factorization.

64270921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1416.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 64270921 is about 8016.9146808482. The cubic root of 64270921 is about 400.5636241964.

The spelling of 64270921 in words is "sixty-four million, two hundred seventy thousand, nine hundred twenty-one".