9997250 has 16 divisors (see below), whose sum is σ = 18715320. Its totient is φ = 3998800.

The previous prime is 9997237. The next prime is 9997291. The reversal of 9997250 is 527999.

It can be written as a sum of positive squares in 4 ways, for example, as 1394761 + 8602489 = 1181^2 + 2933^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 9997198 and 9997207.

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, 19745 + ... + 20244.

Almost surely, 2^9997250 is an apocalyptic number.

9997250 is a deficient number, since it is larger than the sum of its proper divisors (8718070).

9997250 is a wasteful number, since it uses less digits than its factorization.

9997250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40006 (or 39996 counting only the distinct ones).

The product of its (nonzero) digits is 51030, while the sum is 41.

The square root of 9997250 is about 3161.8428170926. The cubic root of 9997250 is about 215.4237182079.

The spelling of 9997250 in words is "nine million, nine hundred ninety-seven thousand, two hundred fifty".