125001621 has 12 divisors (see below), whose sum is σ = 182844480. Its totient is φ = 82279080.

The previous prime is 125001599. The next prime is 125001631. The reversal of 125001621 is 126100521.

125001621 is a `hidden beast` number, since 1 + 2 + 500 + 162 + 1 = 666.

It is not a de Polignac number, because 125001621 - 2¹⁰ = 125000597 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125001594 and 125001603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125001631) 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, 87195 + ... + 88616.

It is an arithmetic number, because the mean of its divisors is an integer number (15237040).

Almost surely, 2^125001621 is an apocalyptic number.

It is an amenable number.

125001621 is a deficient number, since it is larger than the sum of its proper divisors (57842859).

125001621 is a wasteful number, since it uses less digits than its factorization.

125001621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175896 (or 175893 counting only the distinct ones).

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

The square root of 125001621 is about 11180.4123805878. The cubic root of 125001621 is about 500.0021613240.

The spelling of 125001621 in words is "one hundred twenty-five million, one thousand, six hundred twenty-one".