1056557 has 4 divisors (see below), whose sum is σ = 1093020. Its totient is φ = 1020096.

The previous prime is 1056541. The next prime is 1056563. The reversal of 1056557 is 7556501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7556501 = 29 ⋅260569.

It can be written as a sum of positive squares in 2 ways, for example, as 763876 + 292681 = 874^2 + 541^2 .

It is a cyclic number.

It is not a de Polignac number, because 1056557 - 2⁴ = 1056541 is a prime.

It is a super-2 number, since 2×1056557² = 2232625388498, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29), and also a Moran number because the ratio is a prime number: 36433 = 1056557 / (1 + 0 + 5 + 6 + 5 + 5 + 7).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056577) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18188 + ... + 18245.

It is an arithmetic number, because the mean of its divisors is an integer number (273255).

2^1056557 is an apocalyptic number.

It is an amenable number.

1056557 is a deficient number, since it is larger than the sum of its proper divisors (36463).

1056557 is an equidigital number, since it uses as much as digits as its factorization.

1056557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36462.

The product of its (nonzero) digits is 5250, while the sum is 29.

The square root of 1056557 is about 1027.8895855100. The cubic root of 1056557 is about 101.8507685729.

The spelling of 1056557 in words is "one million, fifty-six thousand, five hundred fifty-seven".