2541661 has 8 divisors (see below), whose sum is σ = 2698560. Its totient is φ = 2388672.

The previous prime is 2541613. The next prime is 2541677. The reversal of 2541661 is 1661452.

2541661 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2541661 - 2⁷ = 2541533 is a prime.

It is a Duffinian number.

2541661 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2541061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421 + ... + 2293.

It is an arithmetic number, because the mean of its divisors is an integer number (337320).

2^2541661 is an apocalyptic number.

It is an amenable number.

2541661 is a deficient number, since it is larger than the sum of its proper divisors (156899).

2541661 is a wasteful number, since it uses less digits than its factorization.

2541661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955.

The product of its digits is 1440, while the sum is 25.

The square root of 2541661 is about 1594.2587619330. The cubic root of 2541661 is about 136.4706337467.

The spelling of 2541661 in words is "two million, five hundred forty-one thousand, six hundred sixty-one".