2123149 has 4 divisors (see below), whose sum is σ = 2426464. Its totient is φ = 1819836.

The previous prime is 2123141. The next prime is 2123161. The reversal of 2123149 is 9413212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2123149 - 2³ = 2123141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123141) 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, 151647 + ... + 151660.

It is an arithmetic number, because the mean of its divisors is an integer number (606616).

2^2123149 is an apocalyptic number.

It is an amenable number.

2123149 is a deficient number, since it is larger than the sum of its proper divisors (303315).

2123149 is an equidigital number, since it uses as much as digits as its factorization.

2123149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 303314.

The product of its digits is 432, while the sum is 22.

The square root of 2123149 is about 1457.1029476327. The cubic root of 2123149 is about 128.5267397305.

The spelling of 2123149 in words is "two million, one hundred twenty-three thousand, one hundred forty-nine".