71245012 has 6 divisors (see below), whose sum is σ = 124678778. Its totient is φ = 35622504.

The previous prime is 71244989. The next prime is 71245061. The reversal of 71245012 is 21054217.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 70627216 + 617796 = 8404^2 + 786^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8905623 + ... + 8905630.

Almost surely, 2^71245012 is an apocalyptic number.

It is an amenable number.

71245012 is a deficient number, since it is larger than the sum of its proper divisors (53433766).

71245012 is a wasteful number, since it uses less digits than its factorization.

71245012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17811257 (or 17811255 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 71245012 is about 8440.6760392755. The cubic root of 71245012 is about 414.5575426619.

Adding to 71245012 its reverse (21054217), we get a palindrome (92299229).

The spelling of 71245012 in words is "seventy-one million, two hundred forty-five thousand, twelve".