125421164 has 24 divisors (see below), whose sum is σ = 247166976. Its totient is φ = 55170000.

The previous prime is 125421151. The next prime is 125421167. The reversal of 125421164 is 461124521.

125421164 = 3956² + 3957² + ... + 3963².

It is a super-2 number, since 2×125421164² = 31460936758229792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125421167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44612 + ... + 47339.

It is an arithmetic number, because the mean of its divisors is an integer number (10298624).

Almost surely, 2^125421164 is an apocalyptic number.

It is an amenable number.

125421164 is a deficient number, since it is larger than the sum of its proper divisors (121745812).

125421164 is a wasteful number, since it uses less digits than its factorization.

125421164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91997 (or 91995 counting only the distinct ones).

The product of its digits is 1920, while the sum is 26.

The square root of 125421164 is about 11199.1590755735. The cubic root of 125421164 is about 500.5609224966.

Adding to 125421164 its reverse (461124521), we get a palindrome (586545685).

The spelling of 125421164 in words is "one hundred twenty-five million, four hundred twenty-one thousand, one hundred sixty-four".