2505747 has 4 divisors (see below), whose sum is σ = 3341000. Its totient is φ = 1670496.

The previous prime is 2505743. The next prime is 2505773. The reversal of 2505747 is 7475052.

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

It is not a de Polignac number, because 2505747 - 2² = 2505743 is a prime.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2505743) 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, 417622 + ... + 417627.

It is an arithmetic number, because the mean of its divisors is an integer number (835250).

2^2505747 is an apocalyptic number.

2505747 is a deficient number, since it is larger than the sum of its proper divisors (835253).

2505747 is an equidigital number, since it uses as much as digits as its factorization.

2505747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 835252.

The product of its (nonzero) digits is 9800, while the sum is 30.

The square root of 2505747 is about 1582.9551478169. The cubic root of 2505747 is about 135.8247996278.

The spelling of 2505747 in words is "two million, five hundred five thousand, seven hundred forty-seven".