125553121 has 16 divisors (see below), whose sum is σ = 137318400. Its totient is φ = 114393168.

The previous prime is 125553091. The next prime is 125553133. The reversal of 125553121 is 121355521.

It is a cyclic number.

It is not a de Polignac number, because 125553121 - 2⁷ = 125552993 is a prime.

It is a super-3 number, since 3×125553121³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125553161) 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 15 ways as a sum of consecutive naturals, for example, 51496 + ... + 53878.

It is an arithmetic number, because the mean of its divisors is an integer number (8582400).

Almost surely, 2^125553121 is an apocalyptic number.

It is an amenable number.

125553121 is a deficient number, since it is larger than the sum of its proper divisors (11765279).

125553121 is a wasteful number, since it uses less digits than its factorization.

125553121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2508.

The product of its digits is 1500, while the sum is 25.

The square root of 125553121 is about 11205.0489066313. The cubic root of 125553121 is about 500.7364095362.

The spelling of 125553121 in words is "one hundred twenty-five million, five hundred fifty-three thousand, one hundred twenty-one".