1055509 has 12 divisors (see below), whose sum is σ = 1323084. Its totient is φ = 834624.

The previous prime is 1055503. The next prime is 1055531. The reversal of 1055509 is 9055501.

1055509 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in 2 ways, for example, as 240100 + 815409 = 490^2 + 903^2 .

It is not a de Polignac number, because 1055509 - 2³ = 1055501 is a prime.

It is a super-2 number, since 2×1055509² = 2228198498162, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055501) 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, 192 + ... + 1465.

It is an arithmetic number, because the mean of its divisors is an integer number (110257).

2^1055509 is an apocalyptic number.

It is an amenable number.

1055509 is a deficient number, since it is larger than the sum of its proper divisors (267575).

1055509 is a wasteful number, since it uses less digits than its factorization.

1055509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1684 (or 1677 counting only the distinct ones).

The product of its (nonzero) digits is 1125, while the sum is 25.

The square root of 1055509 is about 1027.3796766532. The cubic root of 1055509 is about 101.8170821377.

The spelling of 1055509 in words is "one million, fifty-five thousand, five hundred nine".