121972625 has 16 divisors (see below), whose sum is σ = 153159552. Its totient is φ = 96977200.

The previous prime is 121972601. The next prime is 121972649. The reversal of 121972625 is 526279121.

It is an interprime number because it is at equal distance from previous prime (121972601) and next prime (121972649).

It is not a de Polignac number, because 121972625 - 2⁸ = 121972369 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 5.

It is a zygodrome in base 5.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17954 + ... + 23796.

It is an arithmetic number, because the mean of its divisors is an integer number (9572472).

Almost surely, 2^121972625 is an apocalyptic number.

It is an amenable number.

121972625 is a deficient number, since it is larger than the sum of its proper divisors (31186927).

121972625 is an equidigital number, since it uses as much as digits as its factorization.

121972625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6025 (or 6015 counting only the distinct ones).

The product of its digits is 15120, while the sum is 35.

The square root of 121972625 is about 11044.1217396405. The cubic root of 121972625 is about 495.9304676745.

The spelling of 121972625 in words is "one hundred twenty-one million, nine hundred seventy-two thousand, six hundred twenty-five".