64974261 has 16 divisors (see below), whose sum is σ = 95708160. Its totient is φ = 38878320.

The previous prime is 64974227. The next prime is 64974263. The reversal of 64974261 is 16247946.

It is a happy number.

It is not a de Polignac number, because 64974261 - 2⁶ = 64974197 is a prime.

It is a super-2 number, since 2×64974261² = 8443309184992242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64974263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9855 + ... + 15068.

It is an arithmetic number, because the mean of its divisors is an integer number (5981760).

Almost surely, 2^64974261 is an apocalyptic number.

It is an amenable number.

64974261 is a deficient number, since it is larger than the sum of its proper divisors (30733899).

64974261 is a wasteful number, since it uses less digits than its factorization.

64974261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25016.

The product of its digits is 72576, while the sum is 39.

The square root of 64974261 is about 8060.6613252264. The cubic root of 64974261 is about 402.0194973341.

Adding to 64974261 its sum of digits (39), we get a triangular number (64974300 = T₁₁₃₉₉).

The spelling of 64974261 in words is "sixty-four million, nine hundred seventy-four thousand, two hundred sixty-one".