1055985 has 32 divisors (see below), whose sum is σ = 1969920. Its totient is φ = 473088.

The previous prime is 1055981. The next prime is 1056007. The reversal of 1055985 is 5895501.

1055985 = 35² + 36² + ... + 147².

It is not a de Polignac number, because 1055985 - 2² = 1055981 is a prime.

It is a super-2 number, since 2×1055985² = 2230208640450, which contains 22 as substring.

It is a Curzon number.

1055985 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1055981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9289 + ... + 9401.

It is an arithmetic number, because the mean of its divisors is an integer number (61560).

2^1055985 is an apocalyptic number.

1055985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1055985 is a deficient number, since it is larger than the sum of its proper divisors (913935).

1055985 is a wasteful number, since it uses less digits than its factorization.

1055985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217.

The product of its (nonzero) digits is 9000, while the sum is 33.

The square root of 1055985 is about 1027.6113078397. The cubic root of 1055985 is about 101.8323852277.

The spelling of 1055985 in words is "one million, fifty-five thousand, nine hundred eighty-five".