990951225 has 24 divisors (see below), whose sum is σ = 1787317152. Its totient is φ = 480460800.

The previous prime is 990951209. The next prime is 990951287. The reversal of 990951225 is 522159099.

It is a happy number.

It is not a de Polignac number, because 990951225 - 2⁴ = 990951209 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, 599752 + ... + 601401.

It is an arithmetic number, because the mean of its divisors is an integer number (74471548).

Almost surely, 2^990951225 is an apocalyptic number.

It is an amenable number.

990951225 is a deficient number, since it is larger than the sum of its proper divisors (796365927).

990951225 is a wasteful number, since it uses less digits than its factorization.

990951225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201177 (or 1201172 counting only the distinct ones).

The product of its (nonzero) digits is 72900, while the sum is 42.

The square root of 990951225 is about 31479.3777733932. The cubic root of 990951225 is about 996.9745978390.

The spelling of 990951225 in words is "nine hundred ninety million, nine hundred fifty-one thousand, two hundred twenty-five".