71539074 has 12 divisors (see below), whose sum is σ = 155001366. Its totient is φ = 23846352.

The previous prime is 71539033. The next prime is 71539079. The reversal of 71539074 is 47093517.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 71520849 + 18225 = 8457^2 + 135^2 .

It is not an unprimeable number, because it can be changed into a prime (71539079) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1987179 + ... + 1987214.

Almost surely, 2^71539074 is an apocalyptic number.

71539074 is an abundant number, since it is smaller than the sum of its proper divisors (83462292).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

71539074 is a wasteful number, since it uses less digits than its factorization.

71539074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3974401 (or 3974398 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The square root of 71539074 is about 8458.0774411210. The cubic root of 71539074 is about 415.1271183624.

The spelling of 71539074 in words is "seventy-one million, five hundred thirty-nine thousand, seventy-four".