71257967 has 8 divisors (see below), whose sum is σ = 79837392. Its totient is φ = 63028800.

The previous prime is 71257951. The next prime is 71258003. The reversal of 71257967 is 76975217.

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 71257967 - 2⁴ = 71257951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71257367) 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, 87134 + ... + 87947.

It is an arithmetic number, because the mean of its divisors is an integer number (9979674).

Almost surely, 2^71257967 is an apocalyptic number.

71257967 is a deficient number, since it is larger than the sum of its proper divisors (8579425).

71257967 is a wasteful number, since it uses less digits than its factorization.

71257967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175129.

The product of its digits is 185220, while the sum is 44.

The square root of 71257967 is about 8441.4434192264. The cubic root of 71257967 is about 414.5826684792.

The spelling of 71257967 in words is "seventy-one million, two hundred fifty-seven thousand, nine hundred sixty-seven".