125661351 has 32 divisors (see below), whose sum is σ = 183439872. Its totient is φ = 76285440.

The previous prime is 125661337. The next prime is 125661353. The reversal of 125661351 is 153166521.

It is not a de Polignac number, because 125661351 - 2¹⁵ = 125628583 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125661353) 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 31 ways as a sum of consecutive naturals, for example, 121131 + ... + 122163.

It is an arithmetic number, because the mean of its divisors is an integer number (5732496).

Almost surely, 2^125661351 is an apocalyptic number.

125661351 is a deficient number, since it is larger than the sum of its proper divisors (57778521).

125661351 is a wasteful number, since it uses less digits than its factorization.

125661351 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1143.

The product of its digits is 5400, while the sum is 30.

The square root of 125661351 is about 11209.8773855917. The cubic root of 125661351 is about 500.8802507412.

The spelling of 125661351 in words is "one hundred twenty-five million, six hundred sixty-one thousand, three hundred fifty-one".