2542661 has 8 divisors (see below), whose sum is σ = 2803584. Its totient is φ = 2286720.

The previous prime is 2542649. The next prime is 2542669. The reversal of 2542661 is 1662452.

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 2542661 - 2⁶ = 2542597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2542661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2542669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125 + ... + 2258.

It is an arithmetic number, because the mean of its divisors is an integer number (350448).

2^2542661 is an apocalyptic number.

It is an amenable number.

2542661 is a deficient number, since it is larger than the sum of its proper divisors (260923).

2542661 is a wasteful number, since it uses less digits than its factorization.

2542661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2491.

The product of its digits is 2880, while the sum is 26.

The square root of 2542661 is about 1594.5723564643. The cubic root of 2542661 is about 136.4885292279.

The spelling of 2542661 in words is "two million, five hundred forty-two thousand, six hundred sixty-one".