865057 has 2 divisors, whose sum is σ = 865058. Its totient is φ = 865056.

The previous prime is 865049. The next prime is 865061. The reversal of 865057 is 750568.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 772641 + 92416 = 879^2 + 304^2 .

It is a cyclic number.

It is not a de Polignac number, because 865057 - 2³ = 865049 is a prime.

It is a super-2 number, since 2×865057² = 1496647226498, which contains 22 as substring.

It is a nialpdrome in base 16.

It is not a weakly prime, because it can be changed into another prime (865087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 432528 + 432529.

It is an arithmetic number, because the mean of its divisors is an integer number (432529).

2⁸⁶⁵⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

865057 is a deficient number, since it is larger than the sum of its proper divisors (1).

865057 is an equidigital number, since it uses as much as digits as its factorization.

865057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 865057 is about 930.0844047720. The cubic root of 865057 is about 95.2828871724.

The spelling of 865057 in words is "eight hundred sixty-five thousand, fifty-seven".