121208425 has 24 divisors (see below), whose sum is σ = 162411480. Its totient is φ = 89203200.

The previous prime is 121208389. The next prime is 121208447. The reversal of 121208425 is 524802121.

It can be written as a sum of positive squares in 12 ways, for example, as 39287824 + 81920601 = 6268^2 + 9051^2 .

It is not a de Polignac number, because 121208425 - 2⁹ = 121207913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 121208425.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149421 + ... + 150229.

It is an arithmetic number, because the mean of its divisors is an integer number (6767145).

Almost surely, 2^121208425 is an apocalyptic number.

It is an amenable number.

121208425 is a deficient number, since it is larger than the sum of its proper divisors (41203055).

121208425 is a wasteful number, since it uses less digits than its factorization.

121208425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293 (or 1288 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 121208425 is about 11009.4697874148. The cubic root of 121208425 is about 494.8925726809.

The spelling of 121208425 in words is "one hundred twenty-one million, two hundred eight thousand, four hundred twenty-five".