9971560 has 32 divisors (see below), whose sum is σ = 22696200. Its totient is φ = 3942400.

The previous prime is 9971551. The next prime is 9971597. The reversal of 9971560 is 651799.

It can be written as a sum of positive squares in 4 ways, for example, as 6563844 + 3407716 = 2562^2 + 1846^2 .

It is a congruent 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, 2160 + ... + 4960.

Almost surely, 2^9971560 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9971560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11348100).

9971560 is an abundant number, since it is smaller than the sum of its proper divisors (12724640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9971560 is a wasteful number, since it uses less digits than its factorization.

9971560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2901 (or 2897 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 37.

The square root of 9971560 is about 3157.7776995856. Note that the first 3 decimals coincide. The cubic root of 9971560 is about 215.2390346682.

The spelling of 9971560 in words is "nine million, nine hundred seventy-one thousand, five hundred sixty".