125414451621 has 12 divisors (see below), whose sum is σ = 182370009900. Its totient is φ = 83048495040.

The previous prime is 125414451599. The next prime is 125414451667. The reversal of 125414451621 is 126154414521.

125414451621 is a `hidden beast` number, since 1 + 2 + 54 + 1 + 445 + 162 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 55778630625 + 69635820996 = 236175^2 + 263886^2 .

It is not a de Polignac number, because 125414451621 - 2³⁰ = 124340709797 is a prime.

It is a super-2 number, since 2×125414451621² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125414461621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 46760200 + ... + 46762881.

It is an arithmetic number, because the mean of its divisors is an integer number (15197500825).

Almost surely, 2^125414451621 is an apocalyptic number.

It is an amenable number.

125414451621 is a deficient number, since it is larger than the sum of its proper divisors (56955558279).

125414451621 is a wasteful number, since it uses less digits than its factorization.

125414451621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93523236 (or 93523233 counting only the distinct ones).

The product of its digits is 38400, while the sum is 36.

The spelling of 125414451621 in words is "one hundred twenty-five billion, four hundred fourteen million, four hundred fifty-one thousand, six hundred twenty-one".