2123449 has 4 divisors (see below), whose sum is σ = 2128464. Its totient is φ = 2118436.

The previous prime is 2123423. The next prime is 2123461. The reversal of 2123449 is 9443212.

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 2123449 - 2⁹ = 2122937 is a prime.

It is a d-powerful number, because it can be written as 2³ + 1 + 2¹⁹ + 3¹³ + 4 + 4⁶ + 9³ .

It is a Duffinian number.

2123449 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2123479) 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, 1807 + ... + 2740.

It is an arithmetic number, because the mean of its divisors is an integer number (532116).

2^2123449 is an apocalyptic number.

It is an amenable number.

2123449 is a deficient number, since it is larger than the sum of its proper divisors (5015).

2123449 is an equidigital number, since it uses as much as digits as its factorization.

2123449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5014.

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

The square root of 2123449 is about 1457.2058879925. The cubic root of 2123449 is about 128.5327930356.

The spelling of 2123449 in words is "two million, one hundred twenty-three thousand, four hundred forty-nine".