125321631 has 4 divisors (see below), whose sum is σ = 167095512. Its totient is φ = 83547752.

The previous prime is 125321629. The next prime is 125321653. The reversal of 125321631 is 136123521.

125321631 is nontrivially palindromic in base 8.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136123521 = 3 ⋅45374507.

It is a cyclic number.

It is not a de Polignac number, because 125321631 - 2¹ = 125321629 is a prime.

It is a super-2 number, since 2×125321631² = 31411022393000322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125321611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20886936 + ... + 20886941.

It is an arithmetic number, because the mean of its divisors is an integer number (41773878).

Almost surely, 2^125321631 is an apocalyptic number.

125321631 is a deficient number, since it is larger than the sum of its proper divisors (41773881).

125321631 is an equidigital number, since it uses as much as digits as its factorization.

125321631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41773880.

The product of its digits is 1080, while the sum is 24.

The square root of 125321631 is about 11194.7144224406. The cubic root of 125321631 is about 500.4284740484.

The spelling of 125321631 in words is "one hundred twenty-five million, three hundred twenty-one thousand, six hundred thirty-one".