1056861 has 16 divisors (see below), whose sum is σ = 1686720. Its totient is φ = 650160.

The previous prime is 1056833. The next prime is 1056863. The reversal of 1056861 is 1686501.

It is not a de Polignac number, because 1056861 - 2⁵ = 1056829 is a prime.

It is a super-2 number, since 2×1056861² = 2233910346642, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1155 + ... + 1856.

It is an arithmetic number, because the mean of its divisors is an integer number (105420).

2^1056861 is an apocalyptic number.

It is an amenable number.

1056861 is a deficient number, since it is larger than the sum of its proper divisors (629859).

1056861 is a wasteful number, since it uses less digits than its factorization.

1056861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3033 (or 3027 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1056861 is about 1028.0374506797. The cubic root of 1056861 is about 101.8605360423.

The spelling of 1056861 in words is "one million, fifty-six thousand, eight hundred sixty-one".