2505647 has 4 divisors (see below), whose sum is σ = 2653056. Its totient is φ = 2358240.

The previous prime is 2505641. The next prime is 2505673. The reversal of 2505647 is 7465052.

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

It is not a de Polignac number, because 2505647 - 2⁴ = 2505631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2505641) 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, 73679 + ... + 73712.

It is an arithmetic number, because the mean of its divisors is an integer number (663264).

2^2505647 is an apocalyptic number.

2505647 is a deficient number, since it is larger than the sum of its proper divisors (147409).

2505647 is a wasteful number, since it uses less digits than its factorization.

2505647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147408.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 2505647 is about 1582.9235610098. The cubic root of 2505647 is about 135.8229927600.

The spelling of 2505647 in words is "two million, five hundred five thousand, six hundred forty-seven".