71172156 has 48 divisors (see below), whose sum is σ = 187020288. Its totient is φ = 20870400.

The previous prime is 71172107. The next prime is 71172161. The reversal of 71172156 is 65127117.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4605 + ... + 12788.

It is an arithmetic number, because the mean of its divisors is an integer number (3896256).

Almost surely, 2^71172156 is an apocalyptic number.

It is an amenable number.

71172156 is an abundant number, since it is smaller than the sum of its proper divisors (115848132).

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

71172156 is a wasteful number, since it uses less digits than its factorization.

71172156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17442 (or 17440 counting only the distinct ones).

The product of its digits is 2940, while the sum is 30.

The square root of 71172156 is about 8436.3591673186. The cubic root of 71172156 is about 414.4161839682.

The spelling of 71172156 in words is "seventy-one million, one hundred seventy-two thousand, one hundred fifty-six".