64121039 has 4 divisors (see below), whose sum is σ = 64357920. Its totient is φ = 63884160.

The previous prime is 64121027. The next prime is 64121053. The reversal of 64121039 is 93012146.

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 64121039 - 2¹⁶ = 64055503 is a prime.

It is a super-2 number, since 2×64121039² = 8223015284879042, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64120999 and 64121017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64121339) 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, 118034 + ... + 118575.

It is an arithmetic number, because the mean of its divisors is an integer number (16089480).

Almost surely, 2^64121039 is an apocalyptic number.

64121039 is a deficient number, since it is larger than the sum of its proper divisors (236881).

64121039 is a wasteful number, since it uses less digits than its factorization.

64121039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 236880.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 64121039 is about 8007.5613641108. The cubic root of 64121039 is about 400.2520057827.

The spelling of 64121039 in words is "sixty-four million, one hundred twenty-one thousand, thirty-nine".