125431213 has 4 divisors (see below), whose sum is σ = 130884768. Its totient is φ = 119977660.

The previous prime is 125431211. The next prime is 125431277. The reversal of 125431213 is 312134521.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 125431213 - 2¹ = 125431211 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125431211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2726743 + ... + 2726788.

It is an arithmetic number, because the mean of its divisors is an integer number (32721192).

Almost surely, 2^125431213 is an apocalyptic number.

It is an amenable number.

125431213 is a deficient number, since it is larger than the sum of its proper divisors (5453555).

125431213 is an equidigital number, since it uses as much as digits as its factorization.

125431213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5453554.

The product of its digits is 720, while the sum is 22.

The square root of 125431213 is about 11199.6077163444. The cubic root of 125431213 is about 500.5742907943.

Adding to 125431213 its reverse (312134521), we get a palindrome (437565734).

The spelling of 125431213 in words is "one hundred twenty-five million, four hundred thirty-one thousand, two hundred thirteen".