64571291 has 4 divisors (see below), whose sum is σ = 67969800. Its totient is φ = 61172784.

The previous prime is 64571263. The next prime is 64571293. The reversal of 64571291 is 19217546.

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 64571291 - 2¹⁴ = 64554907 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64571293) 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, 1699226 + ... + 1699263.

It is an arithmetic number, because the mean of its divisors is an integer number (16992450).

Almost surely, 2^64571291 is an apocalyptic number.

64571291 is a deficient number, since it is larger than the sum of its proper divisors (3398509).

64571291 is a wasteful number, since it uses less digits than its factorization.

64571291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3398508.

The product of its digits is 15120, while the sum is 35.

The square root of 64571291 is about 8035.6263601539. The cubic root of 64571291 is about 401.1866656635.

The spelling of 64571291 in words is "sixty-four million, five hundred seventy-one thousand, two hundred ninety-one".