1055891 has 4 divisors (see below), whose sum is σ = 1089984. Its totient is φ = 1021800.

The previous prime is 1055881. The next prime is 1055893. The reversal of 1055891 is 1985501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1055891 - 2⁶ = 1055827 is a prime.

It is a super-2 number, since 2×1055891² = 2229811607762, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1055893) 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, 17000 + ... + 17061.

It is an arithmetic number, because the mean of its divisors is an integer number (272496).

2^1055891 is an apocalyptic number.

1055891 is a deficient number, since it is larger than the sum of its proper divisors (34093).

1055891 is an equidigital number, since it uses as much as digits as its factorization.

1055891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34092.

The product of its (nonzero) digits is 1800, while the sum is 29.

The square root of 1055891 is about 1027.5655696840. The cubic root of 1055891 is about 101.8293635534.

The spelling of 1055891 in words is "one million, fifty-five thousand, eight hundred ninety-one".