121523425 has 6 divisors (see below), whose sum is σ = 150689078. Its totient is φ = 97218720.

The previous prime is 121523399. The next prime is 121523447. The reversal of 121523425 is 524325121.

It can be written as a sum of positive squares in 3 ways, for example, as 26967249 + 94556176 = 5193^2 + 9724^2 .

It is not a de Polignac number, because 121523425 - 2⁵ = 121523393 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 4860937 = 121523425 / (1 + 2 + 1 + 5 + 2 + 3 + 4 + 2 + 5).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121523425.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2430444 + ... + 2430493.

Almost surely, 2^121523425 is an apocalyptic number.

It is an amenable number.

121523425 is a deficient number, since it is larger than the sum of its proper divisors (29165653).

121523425 is an equidigital number, since it uses as much as digits as its factorization.

121523425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4860947 (or 4860942 counting only the distinct ones).

The product of its digits is 2400, while the sum is 25.

The square root of 121523425 is about 11023.7663708916. The cubic root of 121523425 is about 495.3209155957.

Adding to 121523425 its reverse (524325121), we get a palindrome (645848546).

The spelling of 121523425 in words is "one hundred twenty-one million, five hundred twenty-three thousand, four hundred twenty-five".