71257265 has 4 divisors (see below), whose sum is σ = 85508724. Its totient is φ = 57005808.

The previous prime is 71257261. The next prime is 71257273. The reversal of 71257265 is 56275217.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56275217 = 197 ⋅285661.

It can be written as a sum of positive squares in 2 ways, for example, as 40742689 + 30514576 = 6383^2 + 5524^2 .

It is a cyclic number.

It is not a de Polignac number, because 71257265 - 2² = 71257261 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71257261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7125722 + ... + 7125731.

It is an arithmetic number, because the mean of its divisors is an integer number (21377181).

Almost surely, 2^71257265 is an apocalyptic number.

It is an amenable number.

71257265 is a deficient number, since it is larger than the sum of its proper divisors (14251459).

71257265 is a wasteful number, since it uses less digits than its factorization.

71257265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14251458.

The product of its digits is 29400, while the sum is 35.

The square root of 71257265 is about 8441.4018385574. The cubic root of 71257265 is about 414.5813070502.

The spelling of 71257265 in words is "seventy-one million, two hundred fifty-seven thousand, two hundred sixty-five".