64121275 has 12 divisors (see below), whose sum is σ = 79682400. Its totient is φ = 51186080.

The previous prime is 64121273. The next prime is 64121287. The reversal of 64121275 is 57212146.

It is not a de Polignac number, because 64121275 - 2¹ = 64121273 is a prime.

It is a super-2 number, since 2×64121275² = 8223075815251250, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64121273) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10206 + ... + 15244.

It is an arithmetic number, because the mean of its divisors is an integer number (6640200).

Almost surely, 2^64121275 is an apocalyptic number.

64121275 is a deficient number, since it is larger than the sum of its proper divisors (15561125).

64121275 is a wasteful number, since it uses less digits than its factorization.

64121275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5558 (or 5553 counting only the distinct ones).

The product of its digits is 3360, while the sum is 28.

The square root of 64121275 is about 8007.5761001691. The cubic root of 64121275 is about 400.2524968298.

The spelling of 64121275 in words is "sixty-four million, one hundred twenty-one thousand, two hundred seventy-five".