121992625 has 8 divisors (see below), whose sum is σ = 152246952. Its totient is φ = 97594000.

The previous prime is 121992599. The next prime is 121992641. The reversal of 121992625 is 526299121.

It can be written as a sum of positive squares in 4 ways, for example, as 1168561 + 120824064 = 1081^2 + 10992^2 .

It is not a de Polignac number, because 121992625 - 2⁹ = 121992113 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 487846 + ... + 488095.

It is an arithmetic number, because the mean of its divisors is an integer number (19030869).

Almost surely, 2^121992625 is an apocalyptic number.

It is an amenable number.

121992625 is a deficient number, since it is larger than the sum of its proper divisors (30254327).

121992625 is an frugal number, since it uses more digits than its factorization.

121992625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 975956 (or 975946 counting only the distinct ones).

The product of its digits is 19440, while the sum is 37.

The square root of 121992625 is about 11045.0271615782. The cubic root of 121992625 is about 495.9575723009.

The spelling of 121992625 in words is "one hundred twenty-one million, nine hundred ninety-two thousand, six hundred twenty-five".