125153021 has 16 divisors (see below), whose sum is σ = 144824064. Its totient is φ = 105940224.

The previous prime is 125153003. The next prime is 125153023. The reversal of 125153021 is 120351521.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 125153021 - 2¹⁰ = 125151997 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125152984 and 125153002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125153023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288821 + ... + 289253.

It is an arithmetic number, because the mean of its divisors is an integer number (9051504).

Almost surely, 2^125153021 is an apocalyptic number.

It is an amenable number.

125153021 is a deficient number, since it is larger than the sum of its proper divisors (19671043).

125153021 is a wasteful number, since it uses less digits than its factorization.

125153021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 860.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 125153021 is about 11187.1811016002. The cubic root of 125153021 is about 500.2039448017.

The spelling of 125153021 in words is "one hundred twenty-five million, one hundred fifty-three thousand, twenty-one".