64013261 has 8 divisors (see below), whose sum is σ = 72565920. Its totient is φ = 55978992.

The previous prime is 64013251. The next prime is 64013291. The reversal of 64013261 is 16231046.

It is a happy number.

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 64013261 - 2¹⁰ = 64012237 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 (64013221) 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, 129335 + ... + 129828.

It is an arithmetic number, because the mean of its divisors is an integer number (9070740).

Almost surely, 2^64013261 is an apocalyptic number.

It is an amenable number.

64013261 is a deficient number, since it is larger than the sum of its proper divisors (8552659).

64013261 is a wasteful number, since it uses less digits than its factorization.

64013261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259195.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 64013261 is about 8000.8287695713. The cubic root of 64013261 is about 400.0276251754.

The spelling of 64013261 in words is "sixty-four million, thirteen thousand, two hundred sixty-one".