71087265 has 96 divisors (see below), whose sum is σ = 139276800. Its totient is φ = 33384960.

The previous prime is 71087243. The next prime is 71087279. The reversal of 71087265 is 56278017.

It is not a de Polignac number, because 71087265 - 2⁹ = 71086753 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1165335 + ... + 1165395.

It is an arithmetic number, because the mean of its divisors is an integer number (1450800).

Almost surely, 2^71087265 is an apocalyptic number.

It is an amenable number.

71087265 is a deficient number, since it is larger than the sum of its proper divisors (68189535).

71087265 is a wasteful number, since it uses less digits than its factorization.

71087265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 23520, while the sum is 36.

The square root of 71087265 is about 8431.3264081045. The cubic root of 71087265 is about 414.2513526509.

The spelling of 71087265 in words is "seventy-one million, eighty-seven thousand, two hundred sixty-five".