64136121 has 64 divisors (see below), whose sum is σ = 110481408. Its totient is φ = 32237568.

The previous prime is 64136113. The next prime is 64136123. The reversal of 64136121 is 12163146.

It is not a de Polignac number, because 64136121 - 2³ = 64136113 is a prime.

It is a super-2 number, since 2×64136121² = 8226884033853282, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64136091 and 64136100.

It is not an unprimeable number, because it can be changed into a prime (64136123) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 599350 + ... + 599456.

It is an arithmetic number, because the mean of its divisors is an integer number (1726272).

Almost surely, 2^64136121 is an apocalyptic number.

It is an amenable number.

64136121 is a deficient number, since it is larger than the sum of its proper divisors (46345287).

64136121 is a wasteful number, since it uses less digits than its factorization.

64136121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230.

The product of its digits is 864, while the sum is 24.

The square root of 64136121 is about 8008.5030436406. The cubic root of 64136121 is about 400.2833846022.

Adding to 64136121 its reverse (12163146), we get a palindrome (76299267).

The spelling of 64136121 in words is "sixty-four million, one hundred thirty-six thousand, one hundred twenty-one".