1090557 has 24 divisors (see below), whose sum is σ = 1756800. Its totient is φ = 668304.

The previous prime is 1090553. The next prime is 1090577. The reversal of 1090557 is 7550901.

1090557 is a `hidden beast` number, since 109 + 0 + 557 = 666.

It is not a de Polignac number, because 1090557 - 2² = 1090553 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 1090557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1090553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4444 + ... + 4682.

It is an arithmetic number, because the mean of its divisors is an integer number (73200).

2^1090557 is an apocalyptic number.

It is an amenable number.

1090557 is a deficient number, since it is larger than the sum of its proper divisors (666243).

1090557 is a wasteful number, since it uses less digits than its factorization.

1090557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 274 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 1575, while the sum is 27.

The square root of 1090557 is about 1044.2973714417. The cubic root of 1090557 is about 102.9317737134.

The spelling of 1090557 in words is "one million, ninety thousand, five hundred fifty-seven".