64255121 has 12 divisors (see below), whose sum is σ = 79143588. Its totient is φ = 51835392.

The previous prime is 64255117. The next prime is 64255129. The reversal of 64255121 is 12155246.

64255121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 56415121 + 7840000 = 7511^2 + 2800^2 .

It is not a de Polignac number, because 64255121 - 2² = 64255117 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64255129) 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 11 ways as a sum of consecutive naturals, for example, 37736 + ... + 39401.

It is an arithmetic number, because the mean of its divisors is an integer number (6595299).

Almost surely, 2^64255121 is an apocalyptic number.

It is an amenable number.

64255121 is a deficient number, since it is larger than the sum of its proper divisors (14888467).

64255121 is a wasteful number, since it uses less digits than its factorization.

64255121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77168 (or 77161 counting only the distinct ones).

The product of its digits is 2400, while the sum is 26.

The square root of 64255121 is about 8015.9292037792. The cubic root of 64255121 is about 400.5307974071.

The spelling of 64255121 in words is "sixty-four million, two hundred fifty-five thousand, one hundred twenty-one".