1056881 has 6 divisors (see below), whose sum is σ = 1229490. Its totient is φ = 905856.

The previous prime is 1056871. The next prime is 1056893. The reversal of 1056881 is 1886501.

It can be written as a sum of positive squares in only one way, i.e., 614656 + 442225 = 784^2 + 665^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1056881 is a prime.

It is a super-2 number, since 2×1056881² = 2233994896322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1056871) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10736 + ... + 10833.

It is an arithmetic number, because the mean of its divisors is an integer number (204915).

2^1056881 is an apocalyptic number.

It is an amenable number.

1056881 is a deficient number, since it is larger than the sum of its proper divisors (172609).

1056881 is an equidigital number, since it uses as much as digits as its factorization.

1056881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21583 (or 21576 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 1056881 is about 1028.0471779058. The cubic root of 1056881 is about 101.8611785733.

The spelling of 1056881 in words is "one million, fifty-six thousand, eight hundred eighty-one".