85871572 has 6 divisors (see below), whose sum is σ = 150275258. Its totient is φ = 42935784.

The previous prime is 85871557. The next prime is 85871587. The reversal of 85871572 is 27517858.

It is an interprime number because it is at equal distance from previous prime (85871557) and next prime (85871587).

It can be written as a sum of positive squares in only one way, i.e., 65836996 + 20034576 = 8114^2 + 4476^2 .

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, 10733943 + ... + 10733950.

Almost surely, 2^85871572 is an apocalyptic number.

It is an amenable number.

85871572 is a deficient number, since it is larger than the sum of its proper divisors (64403686).

85871572 is a wasteful number, since it uses less digits than its factorization.

85871572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21467897 (or 21467895 counting only the distinct ones).

The product of its digits is 156800, while the sum is 43.

The square root of 85871572 is about 9266.6915347388. The cubic root of 85871572 is about 441.1806651404.

The spelling of 85871572 in words is "eighty-five million, eight hundred seventy-one thousand, five hundred seventy-two".