42421449 has 16 divisors (see below), whose sum is σ = 64796672. Its totient is φ = 24182928.

The previous prime is 42421411. The next prime is 42421459. The reversal of 42421449 is 94412424.

It is not a de Polignac number, because 42421449 - 2⁷ = 42421321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42421459) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7542 + ... + 11904.

It is an arithmetic number, because the mean of its divisors is an integer number (4049792).

Almost surely, 2^42421449 is an apocalyptic number.

It is an amenable number.

42421449 is a deficient number, since it is larger than the sum of its proper divisors (22375223).

42421449 is a wasteful number, since it uses less digits than its factorization.

42421449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4836.

The product of its digits is 9216, while the sum is 30.

The square root of 42421449 is about 6513.1750321944. The cubic root of 42421449 is about 348.7614700561.

The spelling of 42421449 in words is "forty-two million, four hundred twenty-one thousand, four hundred forty-nine".