121925125 has 16 divisors (see below), whose sum is σ = 173901312. Its totient is φ = 83605200.

The previous prime is 121925123. The next prime is 121925129. The reversal of 121925125 is 521529121.

It is not a de Polignac number, because 121925125 - 2¹ = 121925123 is a prime.

It is a super-2 number, since 2×121925125² = 29731472212531250, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121925093 and 121925102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121925123) 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, 68797 + ... + 70546.

It is an arithmetic number, because the mean of its divisors is an integer number (10868832).

Almost surely, 2^121925125 is an apocalyptic number.

It is an amenable number.

121925125 is a deficient number, since it is larger than the sum of its proper divisors (51976187).

121925125 is an equidigital number, since it uses as much as digits as its factorization.

121925125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139365 (or 139355 counting only the distinct ones).

The product of its digits is 1800, while the sum is 28.

The square root of 121925125 is about 11041.9710649865. The cubic root of 121925125 is about 495.8660823099.

The spelling of 121925125 in words is "one hundred twenty-one million, nine hundred twenty-five thousand, one hundred twenty-five".