1056691 has 4 divisors (see below), whose sum is σ = 1058832. Its totient is φ = 1054552.

The previous prime is 1056667. The next prime is 1056707. The reversal of 1056691 is 1966501.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1966501 = 227 ⋅8663.

It is a cyclic number.

It is not a de Polignac number, because 1056691 - 2⁵ = 1056659 is a prime.

It is a super-2 number, since 2×1056691² = 2233191738962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1056641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90 + ... + 1456.

It is an arithmetic number, because the mean of its divisors is an integer number (264708).

2^1056691 is an apocalyptic number.

1056691 is a deficient number, since it is larger than the sum of its proper divisors (2141).

1056691 is an equidigital number, since it uses as much as digits as its factorization.

1056691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2140.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 1056691 is about 1027.9547655418. The cubic root of 1056691 is about 101.8550742015.

The spelling of 1056691 in words is "one million, fifty-six thousand, six hundred ninety-one".