9971156 has 24 divisors (see below), whose sum is σ = 18880680. Its totient is φ = 4580352.

The previous prime is 9971153. The next prime is 9971161. The reversal of 9971156 is 6511799.

It can be written as a sum of positive squares in 4 ways, for example, as 111556 + 9859600 = 334^2 + 3140^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9971153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17240 + ... + 17808.

It is an arithmetic number, because the mean of its divisors is an integer number (786695).

Almost surely, 2^9971156 is an apocalyptic number.

It is an amenable number.

9971156 is a deficient number, since it is larger than the sum of its proper divisors (8909524).

9971156 is a wasteful number, since it uses less digits than its factorization.

9971156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923 (or 921 counting only the distinct ones).

The product of its digits is 17010, while the sum is 38.

The square root of 9971156 is about 3157.7137299002. The cubic root of 9971156 is about 215.2361278096.

The spelling of 9971156 in words is "nine million, nine hundred seventy-one thousand, one hundred fifty-six".