125220431 has 18 divisors (see below), whose sum is σ = 153756360. Its totient is φ = 101668392.

The previous prime is 125220427. The next prime is 125220443. The reversal of 125220431 is 134022521.

It is not a de Polignac number, because 125220431 - 2² = 125220427 is a prime.

It is a super-2 number, since 2×125220431² = 31360312679651522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125220421) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 14150 + ... + 21228.

It is an arithmetic number, because the mean of its divisors is an integer number (8542020).

Almost surely, 2^125220431 is an apocalyptic number.

125220431 is a deficient number, since it is larger than the sum of its proper divisors (28535929).

125220431 is an equidigital number, since it uses as much as digits as its factorization.

125220431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7131 (or 7105 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 125220431 is about 11190.1935193275. The cubic root of 125220431 is about 500.2937354052.

Adding to 125220431 its reverse (134022521), we get a palindrome (259242952).

The spelling of 125220431 in words is "one hundred twenty-five million, two hundred twenty thousand, four hundred thirty-one".