121251525 has 12 divisors (see below), whose sum is σ = 200469312. Its totient is φ = 64667440.

The previous prime is 121251517. The next prime is 121251527. The reversal of 121251525 is 525152121.

It is not a de Polignac number, because 121251525 - 2³ = 121251517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121251495 and 121251504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121251527) 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, 808269 + ... + 808418.

It is an arithmetic number, because the mean of its divisors is an integer number (16705776).

Almost surely, 2^121251525 is an apocalyptic number.

121251525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121251525 is a deficient number, since it is larger than the sum of its proper divisors (79217787).

121251525 is a wasteful number, since it uses less digits than its factorization.

121251525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616700 (or 1616695 counting only the distinct ones).

The product of its digits is 1000, while the sum is 24.

The square root of 121251525 is about 11011.4270192378. The cubic root of 121251525 is about 494.9512246604.

The spelling of 121251525 in words is "one hundred twenty-one million, two hundred fifty-one thousand, five hundred twenty-five".