2045817 has 12 divisors (see below), whose sum is σ = 3064880. Its totient is φ = 1363716.

The previous prime is 2045789. The next prime is 2045819. The reversal of 2045817 is 7185402.

It is not a de Polignac number, because 2045817 - 2⁶ = 2045753 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2045819) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3967 + ... + 4452.

2^2045817 is an apocalyptic number.

2045817 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2045817 is a deficient number, since it is larger than the sum of its proper divisors (1019063).

2045817 is an frugal number, since it uses more digits than its factorization.

2045817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8434 (or 8422 counting only the distinct ones).

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

The square root of 2045817 is about 1430.3205934335. The cubic root of 2045817 is about 126.9469470680.

The spelling of 2045817 in words is "two million, forty-five thousand, eight hundred seventeen".