85257140 has 24 divisors (see below), whose sum is σ = 179663400. Its totient is φ = 33984128.

The previous prime is 85257121. The next prime is 85257143. The reversal of 85257140 is 4175258.

It can be written as a sum of positive squares in 4 ways, for example, as 42276004 + 42981136 = 6502^2 + 6556^2 .

It is a junction number, because it is equal to n+sod(n) for n = 85257097 and 85257106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85257143) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1415 + ... + 13134.

It is an arithmetic number, because the mean of its divisors is an integer number (7485975).

Almost surely, 2^85257140 is an apocalyptic number.

It is an amenable number.

85257140 is an abundant number, since it is smaller than the sum of its proper divisors (94406260).

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

85257140 is a wasteful number, since it uses less digits than its factorization.

85257140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14851 (or 14849 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 32.

The square root of 85257140 is about 9233.4793008919. The cubic root of 85257140 is about 440.1258937277.

The spelling of 85257140 in words is "eighty-five million, two hundred fifty-seven thousand, one hundred forty".