64121351 has 6 divisors (see below), whose sum is σ = 74590200. Its totient is φ = 54961116.

The previous prime is 64121347. The next prime is 64121353. The reversal of 64121351 is 15312146.

64121351 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64121351 - 2² = 64121347 is a prime.

It is a super-2 number, since 2×64121351² = 8223095308130402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64121353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 654251 + ... + 654348.

It is an arithmetic number, because the mean of its divisors is an integer number (12431700).

Almost surely, 2^64121351 is an apocalyptic number.

64121351 is a deficient number, since it is larger than the sum of its proper divisors (10468849).

64121351 is a wasteful number, since it uses less digits than its factorization.

64121351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1308613 (or 1308606 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 64121351 is about 8007.5808456737. The cubic root of 64121351 is about 400.2526549634.

Adding to 64121351 its reverse (15312146), we get a palindrome (79433497).

The spelling of 64121351 in words is "sixty-four million, one hundred twenty-one thousand, three hundred fifty-one".