71081004 has 24 divisors (see below), whose sum is σ = 166154688. Its totient is φ = 23650960.

The previous prime is 71080991. The next prime is 71081057. The reversal of 71081004 is 40018017.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1999 + ... + 12089.

It is an arithmetic number, because the mean of its divisors is an integer number (6923112).

Almost surely, 2^71081004 is an apocalyptic number.

It is an amenable number.

71081004 is an abundant number, since it is smaller than the sum of its proper divisors (95073684).

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

71081004 is a wasteful number, since it uses less digits than its factorization.

71081004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10685 (or 10683 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 71081004 is about 8430.9551060363. The cubic root of 71081004 is about 414.2391905856.

The spelling of 71081004 in words is "seventy-one million, eighty-one thousand, four".