2149249 has 2 divisors, whose sum is σ = 2149250. Its totient is φ = 2149248.

The previous prime is 2149247. The next prime is 2149283. The reversal of 2149249 is 9429412.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1703025 + 446224 = 1305^2 + 668^2 .

It is a cyclic number.

It is not a de Polignac number, because 2149249 - 2¹ = 2149247 is a prime.

Together with 2149247, it forms a pair of twin primes.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 2149249.

It is not a weakly prime, because it can be changed into another prime (2149247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1074624 + 1074625.

It is an arithmetic number, because the mean of its divisors is an integer number (1074625).

2^2149249 is an apocalyptic number.

It is an amenable number.

2149249 is a deficient number, since it is larger than the sum of its proper divisors (1).

2149249 is an equidigital number, since it uses as much as digits as its factorization.

2149249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5184, while the sum is 31.

The square root of 2149249 is about 1466.0317186200. The cubic root of 2149249 is about 129.0512585991.

The spelling of 2149249 in words is "two million, one hundred forty-nine thousand, two hundred forty-nine".