121657425 has 24 divisors (see below), whose sum is σ = 201549600. Its totient is φ = 64752000.

The previous prime is 121657381. The next prime is 121657463. The reversal of 121657425 is 524756121.

It is not a de Polignac number, because 121657425 - 2¹⁰ = 121656401 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43726 + ... + 46424.

It is an arithmetic number, because the mean of its divisors is an integer number (8397900).

Almost surely, 2^121657425 is an apocalyptic number.

121657425 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121657425 is a deficient number, since it is larger than the sum of its proper divisors (79892175).

121657425 is a wasteful number, since it uses less digits than its factorization.

121657425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3313 (or 3308 counting only the distinct ones).

The product of its digits is 16800, while the sum is 33.

The square root of 121657425 is about 11029.8424739431. The cubic root of 121657425 is about 495.5029069054.

The spelling of 121657425 in words is "one hundred twenty-one million, six hundred fifty-seven thousand, four hundred twenty-five".