71217492 has 24 divisors (see below), whose sum is σ = 170228352. Its totient is φ = 23160000.

The previous prime is 71217479. The next prime is 71217541. The reversal of 71217492 is 29471217.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71884 + ... + 72867.

It is an arithmetic number, because the mean of its divisors is an integer number (7092848).

Almost surely, 2^71217492 is an apocalyptic number.

It is an amenable number.

71217492 is an abundant number, since it is smaller than the sum of its proper divisors (99010860).

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

71217492 is a wasteful number, since it uses less digits than its factorization.

71217492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144799 (or 144797 counting only the distinct ones).

The product of its digits is 7056, while the sum is 33.

The square root of 71217492 is about 8439.0456806442. The cubic root of 71217492 is about 414.5041583734.

The spelling of 71217492 in words is "seventy-one million, two hundred seventeen thousand, four hundred ninety-two".