71257255 has 4 divisors (see below), whose sum is σ = 85508712. Its totient is φ = 57005800.

The previous prime is 71257229. The next prime is 71257261. The reversal of 71257255 is 55275217.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55275217 = 7187 ⋅7691.

It is not a de Polignac number, because 71257255 - 2⁵ = 71257223 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71257255.

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, 7125721 + ... + 7125730.

It is an arithmetic number, because the mean of its divisors is an integer number (21377178).

Almost surely, 2^71257255 is an apocalyptic number.

71257255 is a deficient number, since it is larger than the sum of its proper divisors (14251457).

71257255 is a wasteful number, since it uses less digits than its factorization.

71257255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14251456.

The product of its digits is 24500, while the sum is 34.

The square root of 71257255 is about 8441.4012462387. The cubic root of 71257255 is about 414.5812876566.

The spelling of 71257255 in words is "seventy-one million, two hundred fifty-seven thousand, two hundred fifty-five".