125121231 has 6 divisors (see below), whose sum is σ = 180730680. Its totient is φ = 83414148.

The previous prime is 125121169. The next prime is 125121247. The reversal of 125121231 is 132121521.

It is not a de Polignac number, because 125121231 - 2⁷ = 125121103 is a prime.

It is a super-2 number, since 2×125121231² = 31310644893910722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125121281) 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 5 ways as a sum of consecutive naturals, for example, 6951171 + ... + 6951188.

It is an arithmetic number, because the mean of its divisors is an integer number (30121780).

Almost surely, 2^125121231 is an apocalyptic number.

125121231 is a deficient number, since it is larger than the sum of its proper divisors (55609449).

125121231 is a wasteful number, since it uses less digits than its factorization.

125121231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13902365 (or 13902362 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 125121231 is about 11185.7601887400. The cubic root of 125121231 is about 500.1615891056.

Adding to 125121231 its reverse (132121521), we get a palindrome (257242752).

The spelling of 125121231 in words is "one hundred twenty-five million, one hundred twenty-one thousand, two hundred thirty-one".