71691252 has 12 divisors (see below), whose sum is σ = 167279616. Its totient is φ = 23897080.

The previous prime is 71691229. The next prime is 71691307. The reversal of 71691252 is 25219617.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×71691252² = 10279271226655008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2987124 + ... + 2987147.

It is an arithmetic number, because the mean of its divisors is an integer number (13939968).

Almost surely, 2^71691252 is an apocalyptic number.

It is an amenable number.

71691252 is an abundant number, since it is smaller than the sum of its proper divisors (95588364).

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

71691252 is a wasteful number, since it uses less digits than its factorization.

71691252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5974278 (or 5974276 counting only the distinct ones).

The product of its digits is 7560, while the sum is 33.

The square root of 71691252 is about 8467.0686781200. The cubic root of 71691252 is about 415.4212628530.

The spelling of 71691252 in words is "seventy-one million, six hundred ninety-one thousand, two hundred fifty-two".