2045517 has 4 divisors (see below), whose sum is σ = 2727360. Its totient is φ = 1363676.

The previous prime is 2045509. The next prime is 2045539. The reversal of 2045517 is 7155402.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2045517 - 2³ = 2045509 is a prime.

It is a D-number.

2045517 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2045557) 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 3 ways as a sum of consecutive naturals, for example, 340917 + ... + 340922.

It is an arithmetic number, because the mean of its divisors is an integer number (681840).

2^2045517 is an apocalyptic number.

It is an amenable number.

2045517 is a deficient number, since it is larger than the sum of its proper divisors (681843).

2045517 is an equidigital number, since it uses as much as digits as its factorization.

2045517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681842.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 2045517 is about 1430.2157179950. The cubic root of 2045517 is about 126.9407415691.

The spelling of 2045517 in words is "two million, forty-five thousand, five hundred seventeen".