2045871 has 8 divisors (see below), whose sum is σ = 3030960. Its totient is φ = 1363896.

The previous prime is 2045851. The next prime is 2045881. The reversal of 2045871 is 1785402.

It is not a de Polignac number, because 2045871 - 2⁵ = 2045839 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 75773 = 2045871 / (2 + 0 + 4 + 5 + 8 + 7 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2045851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37860 + ... + 37913.

It is an arithmetic number, because the mean of its divisors is an integer number (378870).

2^2045871 is an apocalyptic number.

2045871 is a deficient number, since it is larger than the sum of its proper divisors (985089).

2045871 is an equidigital number, since it uses as much as digits as its factorization.

2045871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75782 (or 75776 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 2045871 is about 1430.3394701958. The cubic root of 2045871 is about 126.9480639934.

It can be divided in two parts, 2045 and 871, that added together give a square (2916 = 54²).

The spelling of 2045871 in words is "two million, forty-five thousand, eight hundred seventy-one".