2121449 has 4 divisors (see below), whose sum is σ = 2314320. Its totient is φ = 1928580.

The previous prime is 2121443. The next prime is 2121461. The reversal of 2121449 is 9441212.

2121449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 2121449 - 2⁴ = 2121433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2121443) 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 3 ways as a sum of consecutive naturals, for example, 96419 + ... + 96440.

It is an arithmetic number, because the mean of its divisors is an integer number (578580).

2^2121449 is an apocalyptic number.

It is an amenable number.

2121449 is a deficient number, since it is larger than the sum of its proper divisors (192871).

2121449 is a wasteful number, since it uses less digits than its factorization.

2121449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192870.

The product of its digits is 576, while the sum is 23.

The square root of 2121449 is about 1456.5194815038. The cubic root of 2121449 is about 128.4924268930.

It can be divided in two parts, 212 and 1449, that added together give a palindrome (1661).

The spelling of 2121449 in words is "two million, one hundred twenty-one thousand, four hundred forty-nine".