2548661 has 4 divisors (see below), whose sum is σ = 2562924. Its totient is φ = 2534400.

The previous prime is 2548643. The next prime is 2548673. The reversal of 2548661 is 1668452.

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

It can be written as a sum of positive squares in 2 ways, for example, as 874225 + 1674436 = 935^2 + 1294^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2548661 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 (2548621) 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, 6860 + ... + 7221.

It is an arithmetic number, because the mean of its divisors is an integer number (640731).

2^2548661 is an apocalyptic number.

It is an amenable number.

2548661 is a deficient number, since it is larger than the sum of its proper divisors (14263).

2548661 is a wasteful number, since it uses less digits than its factorization.

2548661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14262.

The product of its digits is 11520, while the sum is 32.

The square root of 2548661 is about 1596.4526300520. The cubic root of 2548661 is about 136.5958037021.

The spelling of 2548661 in words is "two million, five hundred forty-eight thousand, six hundred sixty-one".