71245279 has 8 divisors (see below), whose sum is σ = 83155968. Its totient is φ = 59767800.

The previous prime is 71245253. The next prime is 71245319. The reversal of 71245279 is 97254217.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71245279 - 2¹¹ = 71243231 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71245219) 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, 107947 + ... + 108604.

It is an arithmetic number, because the mean of its divisors is an integer number (10394496).

Almost surely, 2^71245279 is an apocalyptic number.

71245279 is a deficient number, since it is larger than the sum of its proper divisors (11910689).

71245279 is a wasteful number, since it uses less digits than its factorization.

71245279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216605.

The product of its digits is 35280, while the sum is 37.

The square root of 71245279 is about 8440.6918555294. The cubic root of 71245279 is about 414.5580605308.

It can be divided in two parts, 7124 and 5279, that added together give a triangular number (12403 = T₁₅₇).

The spelling of 71245279 in words is "seventy-one million, two hundred forty-five thousand, two hundred seventy-nine".