121397625 has 72 divisors (see below), whose sum is σ = 230157720. Its totient is φ = 61488000.

The previous prime is 121397587. The next prime is 121397659. The reversal of 121397625 is 526793121.

121397625 is a `hidden beast` number, since 1 + 21 + 3 + 9 + 7 + 625 = 666.

It can be written as a sum of positive squares in 12 ways, for example, as 121352256 + 45369 = 11016^2 + 213^2 .

It is not a de Polignac number, because 121397625 - 2¹¹ = 121395577 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121397625.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1990095 + ... + 1990155.

It is an arithmetic number, because the mean of its divisors is an integer number (3196635).

Almost surely, 2^121397625 is an apocalyptic number.

121397625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121397625 is a deficient number, since it is larger than the sum of its proper divisors (108760095).

121397625 is an equidigital number, since it uses as much as digits as its factorization.

121397625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 98 counting only the distinct ones).

The product of its digits is 22680, while the sum is 36.

The square root of 121397625 is about 11018.0590395950. The cubic root of 121397625 is about 495.1499392731.

The spelling of 121397625 in words is "one hundred twenty-one million, three hundred ninety-seven thousand, six hundred twenty-five".