1055999 has 12 divisors (see below), whose sum is σ = 1283184. Its totient is φ = 864864.

The previous prime is 1055981. The next prime is 1056007. The reversal of 1055999 is 9995501.

It is not a de Polignac number, because 1055999 - 2¹² = 1051903 is a prime.

It is a super-2 number, since 2×1055999² = 2230267776002, which contains 22 as substring.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055939) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 659 + ... + 1595.

It is an arithmetic number, because the mean of its divisors is an integer number (106932).

2^1055999 is an apocalyptic number.

1055999 is a deficient number, since it is larger than the sum of its proper divisors (227185).

1055999 is an equidigital number, since it uses as much as digits as its factorization.

1055999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 974 (or 967 counting only the distinct ones).

The product of its (nonzero) digits is 18225, while the sum is 38.

The square root of 1055999 is about 1027.6181197313. The cubic root of 1055999 is about 101.8328352490.

The spelling of 1055999 in words is "one million, fifty-five thousand, nine hundred ninety-nine".