121605725 has 6 divisors (see below), whose sum is σ = 150791130. Its totient is φ = 97284560.

The previous prime is 121605703. The next prime is 121605733. The reversal of 121605725 is 527506121.

It can be written as a sum of positive squares in 3 ways, for example, as 1352569 + 120253156 = 1163^2 + 10966^2 .

It is not a de Polignac number, because 121605725 - 2²⁶ = 54496861 is a prime.

It is a congruent number.

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, 2432090 + ... + 2432139.

It is an arithmetic number, because the mean of its divisors is an integer number (25131855).

Almost surely, 2^121605725 is an apocalyptic number.

It is an amenable number.

121605725 is a deficient number, since it is larger than the sum of its proper divisors (29185405).

121605725 is an equidigital number, since it uses as much as digits as its factorization.

121605725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4864239 (or 4864234 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 121605725 is about 11027.4985830876. The cubic root of 121605725 is about 495.4327066964.

The spelling of 121605725 in words is "one hundred twenty-one million, six hundred five thousand, seven hundred twenty-five".