125400131 has 4 divisors (see below), whose sum is σ = 126617712. Its totient is φ = 124182552.

The previous prime is 125400047. The next prime is 125400151. The reversal of 125400131 is 131004521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131004521 = 8293 ⋅15797.

It is a cyclic number.

It is not a de Polignac number, because 125400131 - 2²⁶ = 58291267 is a prime.

It is a super-2 number, since 2×125400131² = 31450385709634322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125400151) 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, 608636 + ... + 608841.

It is an arithmetic number, because the mean of its divisors is an integer number (31654428).

Almost surely, 2^125400131 is an apocalyptic number.

125400131 is a deficient number, since it is larger than the sum of its proper divisors (1217581).

125400131 is a wasteful number, since it uses less digits than its factorization.

125400131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1217580.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 125400131 is about 11198.2199924809. The cubic root of 125400131 is about 500.5329397486.

Adding to 125400131 its reverse (131004521), we get a palindrome (256404652).

The spelling of 125400131 in words is "one hundred twenty-five million, four hundred thousand, one hundred thirty-one".