2520647 has 4 divisors (see below), whose sum is σ = 2523840. Its totient is φ = 2517456.

The previous prime is 2520631. The next prime is 2520649. The reversal of 2520647 is 7460252.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2520647 - 2⁴ = 2520631 is a prime.

It is a super-2 number, since 2×2520647² = 12707322597218, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2520649) 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, 554 + ... + 2312.

It is an arithmetic number, because the mean of its divisors is an integer number (630960).

2^2520647 is an apocalyptic number.

2520647 is a deficient number, since it is larger than the sum of its proper divisors (3193).

2520647 is a wasteful number, since it uses less digits than its factorization.

2520647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3192.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 2520647 is about 1587.6545594052. The cubic root of 2520647 is about 136.0934874802.

Adding to 2520647 its reverse (7460252), we get a palindrome (9980899).

The spelling of 2520647 in words is "two million, five hundred twenty thousand, six hundred forty-seven".