71005040 has 40 divisors (see below), whose sum is σ = 168934128. Its totient is φ = 27740160.

The previous prime is 71005027. The next prime is 71005057. The reversal of 71005040 is 4050017.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 6881 + ... + 13760.

Almost surely, 2^71005040 is an apocalyptic number.

It is an amenable number.

71005040 is an abundant number, since it is smaller than the sum of its proper divisors (97929088).

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

71005040 is a wasteful number, since it uses less digits than its factorization.

71005040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20697 (or 20691 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 17.

The square root of 71005040 is about 8426.4488368470. The cubic root of 71005040 is about 414.0915727017.

Adding to 71005040 its reverse (4050017), we get a palindrome (75055057).

The spelling of 71005040 in words is "seventy-one million, five thousand, forty".