121517225 has 12 divisors (see below), whose sum is σ = 152092944. Its totient is φ = 96303120.

The previous prime is 121517203. The next prime is 121517243. The reversal of 121517225 is 522715121.

It is not a de Polignac number, because 121517225 - 2²² = 117322921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121517194 and 121517203.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20039 + ... + 25388.

It is an arithmetic number, because the mean of its divisors is an integer number (12674412).

Almost surely, 2^121517225 is an apocalyptic number.

It is an amenable number.

121517225 is a deficient number, since it is larger than the sum of its proper divisors (30575719).

121517225 is a wasteful number, since it uses less digits than its factorization.

121517225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45544 (or 45539 counting only the distinct ones).

The product of its digits is 1400, while the sum is 26.

The square root of 121517225 is about 11023.4851567007. The cubic root of 121517225 is about 495.3124918648.

The spelling of 121517225 in words is "one hundred twenty-one million, five hundred seventeen thousand, two hundred twenty-five".