71918425 has 6 divisors (see below), whose sum is σ = 89178878. Its totient is φ = 57534720.

The previous prime is 71918389. The next prime is 71918453. The reversal of 71918425 is 52481917.

It can be written as a sum of positive squares in 3 ways, for example, as 143641 + 71774784 = 379^2 + 8472^2 .

It is not a de Polignac number, because 71918425 - 2²⁵ = 38363993 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1438344 + ... + 1438393.

Almost surely, 2^71918425 is an apocalyptic number.

It is an amenable number.

71918425 is a deficient number, since it is larger than the sum of its proper divisors (17260453).

71918425 is a wasteful number, since it uses less digits than its factorization.

71918425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2876747 (or 2876742 counting only the distinct ones).

The product of its digits is 20160, while the sum is 37.

The square root of 71918425 is about 8480.4731589694. The cubic root of 71918425 is about 415.8595914983.

The spelling of 71918425 in words is "seventy-one million, nine hundred eighteen thousand, four hundred twenty-five".