71306972 has 12 divisors (see below), whose sum is σ = 136131576. Its totient is φ = 32412240.

The previous prime is 71306953. The next prime is 71307007. The reversal of 71306972 is 27960317.

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, 810263 + ... + 810350.

It is an arithmetic number, because the mean of its divisors is an integer number (11344298).

Almost surely, 2^71306972 is an apocalyptic number.

It is an amenable number.

71306972 is a deficient number, since it is larger than the sum of its proper divisors (64824604).

71306972 is a wasteful number, since it uses less digits than its factorization.

71306972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620628 (or 1620626 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 35.

The square root of 71306972 is about 8444.3455637486. The cubic root of 71306972 is about 414.6776846062.

The spelling of 71306972 in words is "seventy-one million, three hundred six thousand, nine hundred seventy-two".