85172512 has 12 divisors (see below), whose sum is σ = 167683446. Its totient is φ = 42586240.

The previous prime is 85172453. The next prime is 85172561. The reversal of 85172512 is 21527158.

It can be written as a sum of positive squares in only one way, i.e., 64705936 + 20466576 = 8044^2 + 4524^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1330789 + ... + 1330852.

Almost surely, 2^85172512 is an apocalyptic number.

It is an amenable number.

85172512 is a deficient number, since it is larger than the sum of its proper divisors (82510934).

85172512 is a wasteful number, since it uses less digits than its factorization.

85172512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661651 (or 2661643 counting only the distinct ones).

The product of its digits is 5600, while the sum is 31.

The square root of 85172512 is about 9228.8954918777. The cubic root of 85172512 is about 439.9802194964.

The spelling of 85172512 in words is "eighty-five million, one hundred seventy-two thousand, five hundred twelve".