2549021 has 12 divisors (see below), whose sum is σ = 2816352. Its totient is φ = 2302344.

The previous prime is 2549009. The next prime is 2549039. The reversal of 2549021 is 1209452.

It is not a de Polignac number, because 2549021 - 2⁶ = 2548957 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2549051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8150 + ... + 8456.

It is an arithmetic number, because the mean of its divisors is an integer number (234696).

2^2549021 is an apocalyptic number.

It is an amenable number.

2549021 is a deficient number, since it is larger than the sum of its proper divisors (267331).

2549021 is a wasteful number, since it uses less digits than its factorization.

2549021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368 (or 349 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 2549021 is about 1596.5653760495. The cubic root of 2549021 is about 136.6022348143.

The spelling of 2549021 in words is "two million, five hundred forty-nine thousand, twenty-one".