2121549 has 12 divisors (see below), whose sum is σ = 3006144. Its totient is φ = 1330624.

The previous prime is 2121529. The next prime is 2121569. The reversal of 2121549 is 9451212.

2121549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (2121529) and next prime (2121569).

It is a de Polignac number, because none of the positive numbers 2^k-2121549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121529) 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 11 ways as a sum of consecutive naturals, for example, 357 + ... + 2090.

It is an arithmetic number, because the mean of its divisors is an integer number (250512).

2^2121549 is an apocalyptic number.

It is an amenable number.

2121549 is a deficient number, since it is larger than the sum of its proper divisors (884595).

2121549 is a wasteful number, since it uses less digits than its factorization.

2121549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2484 (or 2467 counting only the distinct ones).

The product of its digits is 720, while the sum is 24.

The square root of 2121549 is about 1456.5538095107. The cubic root of 2121549 is about 128.4944458025.

The spelling of 2121549 in words is "two million, one hundred twenty-one thousand, five hundred forty-nine".