865140285 has 48 divisors (see below), whose sum is σ = 1534548096. Its totient is φ = 415337472.

The previous prime is 865140277. The next prime is 865140293. The reversal of 865140285 is 582041568.

It is an interprime number because it is at equal distance from previous prime (865140277) and next prime (865140293).

It is not a de Polignac number, because 865140285 - 2³ = 865140277 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 95367 + ... + 104043.

It is an arithmetic number, because the mean of its divisors is an integer number (31969752).

Almost surely, 2^865140285 is an apocalyptic number.

865140285 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

It is an amenable number.

865140285 is a deficient number, since it is larger than the sum of its proper divisors (669407811).

865140285 is a wasteful number, since it uses less digits than its factorization.

865140285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8742 (or 8725 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 39.

The square root of 865140285 is about 29413.2671595659. The cubic root of 865140285 is about 952.8594492107.

The spelling of 865140285 in words is "eight hundred sixty-five million, one hundred forty thousand, two hundred eighty-five".