1045891 has 24 divisors (see below), whose sum is σ = 1414656. Its totient is φ = 750720.

The previous prime is 1045859. The next prime is 1045903. The reversal of 1045891 is 1985401.

It is a happy number.

It is not a de Polignac number, because 1045891 - 2⁵ = 1045859 is a prime.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1045801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22230 + ... + 22276.

It is an arithmetic number, because the mean of its divisors is an integer number (58944).

2^1045891 is an apocalyptic number.

1045891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1045891 is a deficient number, since it is larger than the sum of its proper divisors (368765).

1045891 is a wasteful number, since it uses less digits than its factorization.

1045891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99 (or 82 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 1045891 is about 1022.6881245033. The cubic root of 1045891 is about 101.5068790989.

It can be divided in two parts, 1045 and 891, that added together give a square (1936 = 44²).

The spelling of 1045891 in words is "one million, forty-five thousand, eight hundred ninety-one".