1055865 has 16 divisors (see below), whose sum is σ = 1729728. Its totient is φ = 549696.

The previous prime is 1055863. The next prime is 1055867. The reversal of 1055865 is 5685501.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1055863) and next prime (1055867).

It is not a de Polignac number, because 1055865 - 2¹ = 1055863 is a prime.

It is a super-2 number, since 2×1055865² = 2229701796450, which contains 22 as substring.

It is a Curzon number.

1055865 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1055863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174 + ... + 1463.

It is an arithmetic number, because the mean of its divisors is an integer number (108108).

2^1055865 is an apocalyptic number.

1055865 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1055865 is a deficient number, since it is larger than the sum of its proper divisors (673863).

1055865 is a wasteful number, since it uses less digits than its factorization.

1055865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1688.

The product of its (nonzero) digits is 6000, while the sum is 30.

The square root of 1055865 is about 1027.5529183453. The cubic root of 1055865 is about 101.8285277395.

The spelling of 1055865 in words is "one million, fifty-five thousand, eight hundred sixty-five".