2042120449 has 4 divisors (see below), whose sum is σ = 2076732720. Its totient is φ = 2007508180.

The previous prime is 2042120413. The next prime is 2042120459. The reversal of 2042120449 is 9440212402.

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, and also an emirpimes, since its reverse is a distinct semiprime: 9440212402 = 2 ⋅4720106201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2042120449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2042120459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17306047 + ... + 17306164.

It is an arithmetic number, because the mean of its divisors is an integer number (519183180).

Almost surely, 2^2042120449 is an apocalyptic number.

It is an amenable number.

2042120449 is a deficient number, since it is larger than the sum of its proper divisors (34612271).

2042120449 is an equidigital number, since it uses as much as digits as its factorization.

2042120449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34612270.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 2042120449 is about 45189.8268308255. The cubic root of 2042120449 is about 1268.7044156368.

The spelling of 2042120449 in words is "two billion, forty-two million, one hundred twenty thousand, four hundred forty-nine".