2506573 has 4 divisors (see below), whose sum is σ = 2515900. Its totient is φ = 2497248.

The previous prime is 2506571. The next prime is 2506579. The reversal of 2506573 is 3756052.

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 1258884 + 1247689 = 1122^2 + 1117^2 .

It is a cyclic number.

It is not a de Polignac number, because 2506573 - 2¹ = 2506571 is a prime.

It is a Duffinian number.

2506573 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2506571) 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, 4248 + ... + 4801.

It is an arithmetic number, because the mean of its divisors is an integer number (628975).

2^2506573 is an apocalyptic number.

It is an amenable number.

2506573 is a deficient number, since it is larger than the sum of its proper divisors (9327).

2506573 is an equidigital number, since it uses as much as digits as its factorization.

2506573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9326.

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 2506573 is about 1583.2160307425. The cubic root of 2506573 is about 135.8397225176.

The spelling of 2506573 in words is "two million, five hundred six thousand, five hundred seventy-three".