2505761 has 4 divisors (see below), whose sum is σ = 2586624. Its totient is φ = 2424900.

The previous prime is 2505743. The next prime is 2505773. The reversal of 2505761 is 1675052.

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 2505761 - 2¹⁰ = 2504737 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2505761.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505791) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40385 + ... + 40446.

It is an arithmetic number, because the mean of its divisors is an integer number (646656).

2^2505761 is an apocalyptic number.

It is an amenable number.

2505761 is a deficient number, since it is larger than the sum of its proper divisors (80863).

2505761 is an equidigital number, since it uses as much as digits as its factorization.

2505761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80862.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 2505761 is about 1582.9595699196. The cubic root of 2505761 is about 135.8250525855.

The spelling of 2505761 in words is "two million, five hundred five thousand, seven hundred sixty-one".