255632121 has 12 divisors (see below), whose sum is σ = 369450900. Its totient is φ = 170327040.

The previous prime is 255632101. The next prime is 255632123. The reversal of 255632121 is 121236552.

It is a happy number.

255632121 is a `hidden beast` number, since 2 + 5 + 5 + 632 + 1 + 21 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 57836025 + 197796096 = 7605^2 + 14064^2 .

It is not a de Polignac number, because 255632121 - 2⁷ = 255631993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (255632123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11905 + ... + 25553.

It is an arithmetic number, because the mean of its divisors is an integer number (30787575).

Almost surely, 2^255632121 is an apocalyptic number.

It is an amenable number.

255632121 is a deficient number, since it is larger than the sum of its proper divisors (113818779).

255632121 is a wasteful number, since it uses less digits than its factorization.

255632121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15736 (or 15733 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 255632121 is about 15988.4996481846. The cubic root of 255632121 is about 634.6561231504.

Adding to 255632121 its reverse (121236552), we get a palindrome (376868673).

The spelling of 255632121 in words is "two hundred fifty-five million, six hundred thirty-two thousand, one hundred twenty-one".