2520691 has 4 divisors (see below), whose sum is σ = 2543112. Its totient is φ = 2498272.

The previous prime is 2520689. The next prime is 2520697. The reversal of 2520691 is 1960252.

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

It is a cyclic number.

It is not a de Polignac number, because 2520691 - 2¹ = 2520689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2520697) 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, 11041 + ... + 11266.

It is an arithmetic number, because the mean of its divisors is an integer number (635778).

2^2520691 is an apocalyptic number.

2520691 is a deficient number, since it is larger than the sum of its proper divisors (22421).

2520691 is a wasteful number, since it uses less digits than its factorization.

2520691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22420.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 2520691 is about 1587.6684162633. The cubic root of 2520691 is about 136.0942793508.

The spelling of 2520691 in words is "two million, five hundred twenty thousand, six hundred ninety-one".