121525919 has 8 divisors (see below), whose sum is σ = 128931840. Its totient is φ = 114221016.

The previous prime is 121525909. The next prime is 121525931. The reversal of 121525919 is 919525121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121525919 - 2⁴ = 121525903 is a prime.

It is a super-2 number, since 2×121525919² = 29537097977589122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121525909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22769 + ... + 27594.

It is an arithmetic number, because the mean of its divisors is an integer number (16116480).

Almost surely, 2^121525919 is an apocalyptic number.

121525919 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

121525919 is a deficient number, since it is larger than the sum of its proper divisors (7405921).

121525919 is a wasteful number, since it uses less digits than its factorization.

121525919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50509.

The product of its digits is 8100, while the sum is 35.

The square root of 121525919 is about 11023.8794895445. The cubic root of 121525919 is about 495.3243040286.

The spelling of 121525919 in words is "one hundred twenty-one million, five hundred twenty-five thousand, nine hundred nineteen".