2149243 has 4 divisors (see below), whose sum is σ = 2157280. Its totient is φ = 2141208.

The previous prime is 2149237. The next prime is 2149247. The reversal of 2149243 is 3429412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2149243 - 2⁵ = 2149211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2149247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3603 + ... + 4156.

It is an arithmetic number, because the mean of its divisors is an integer number (539320).

2^2149243 is an apocalyptic number.

2149243 is a deficient number, since it is larger than the sum of its proper divisors (8037).

2149243 is an equidigital number, since it uses as much as digits as its factorization.

2149243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8036.

The product of its digits is 1728, while the sum is 25.

The square root of 2149243 is about 1466.0296722782. The cubic root of 2149243 is about 129.0511385094.

The spelling of 2149243 in words is "two million, one hundred forty-nine thousand, two hundred forty-three".