71512245 has 48 divisors (see below), whose sum is σ = 142826112. Its totient is φ = 32423040.

The previous prime is 71512229. The next prime is 71512253. The reversal of 71512245 is 54221517.

It is not a de Polignac number, because 71512245 - 2⁴ = 71512229 is a prime.

It is a super-2 number, since 2×71512245² = 10228002369880050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 40399 + ... + 42131.

It is an arithmetic number, because the mean of its divisors is an integer number (2975544).

Almost surely, 2^71512245 is an apocalyptic number.

It is an amenable number.

71512245 is a deficient number, since it is larger than the sum of its proper divisors (71313867).

71512245 is a wasteful number, since it uses less digits than its factorization.

71512245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1882 (or 1879 counting only the distinct ones).

The product of its digits is 2800, while the sum is 27.

The square root of 71512245 is about 8456.4912936749. The cubic root of 71512245 is about 415.0752174109.

The spelling of 71512245 in words is "seventy-one million, five hundred twelve thousand, two hundred forty-five".