2506045 has 4 divisors (see below), whose sum is σ = 3007260. Its totient is φ = 2004832.

The previous prime is 2506033. The next prime is 2506069. The reversal of 2506045 is 5406052.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1352569 + 1153476 = 1163^2 + 1074^2 .

It is a cyclic number.

It is not a de Polignac number, because 2506045 - 2⁵ = 2506013 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

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, 250600 + ... + 250609.

It is an arithmetic number, because the mean of its divisors is an integer number (751815).

2^2506045 is an apocalyptic number.

It is an amenable number.

2506045 is a deficient number, since it is larger than the sum of its proper divisors (501215).

2506045 is an equidigital number, since it uses as much as digits as its factorization.

2506045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501214.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 2506045 is about 1583.0492727644. The cubic root of 2506045 is about 135.8301838088.

The spelling of 2506045 in words is "two million, five hundred six thousand, forty-five".