121425915 has 64 divisors (see below), whose sum is σ = 220631040. Its totient is φ = 56609280.

The previous prime is 121425893. The next prime is 121425919. The reversal of 121425915 is 519524121.

It is not a de Polignac number, because 121425915 - 2⁸ = 121425659 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121425919) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 320196 + ... + 320574.

It is an arithmetic number, because the mean of its divisors is an integer number (3447360).

Almost surely, 2^121425915 is an apocalyptic number.

121425915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121425915 is a deficient number, since it is larger than the sum of its proper divisors (99205125).

121425915 is a wasteful number, since it uses less digits than its factorization.

121425915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484.

The product of its digits is 3600, while the sum is 30.

The square root of 121425915 is about 11019.3427662452. The cubic root of 121425915 is about 495.1883988498.

The spelling of 121425915 in words is "one hundred twenty-one million, four hundred twenty-five thousand, nine hundred fifteen".