71507412 has 36 divisors (see below), whose sum is σ = 190270080. Its totient is φ = 22581072.

The previous prime is 71507411. The next prime is 71507419. The reversal of 71507412 is 21470517.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×71507412² = 10226619941875488, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71507411) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51588 + ... + 52955.

It is an arithmetic number, because the mean of its divisors is an integer number (5285280).

Almost surely, 2^71507412 is an apocalyptic number.

It is an amenable number.

71507412 is an abundant number, since it is smaller than the sum of its proper divisors (118762668).

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

71507412 is a wasteful number, since it uses less digits than its factorization.

71507412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104572 (or 104567 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 71507412 is about 8456.2055320339. The cubic root of 71507412 is about 415.0658665474.

Adding to 71507412 its reverse (21470517), we get a palindrome (92977929).

The spelling of 71507412 in words is "seventy-one million, five hundred seven thousand, four hundred twelve".