42452779 has 6 divisors (see below), whose sum is σ = 44379356. Its totient is φ = 40606500.

The previous prime is 42452771. The next prime is 42452819. The reversal of 42452779 is 97725424.

It is not a de Polignac number, because 42452779 - 2³ = 42452771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42452771) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 39597 + ... + 40654.

Almost surely, 2^42452779 is an apocalyptic number.

42452779 is a deficient number, since it is larger than the sum of its proper divisors (1926577).

42452779 is an equidigital number, since it uses as much as digits as its factorization.

42452779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80297 (or 80274 counting only the distinct ones).

The product of its digits is 141120, while the sum is 40.

The square root of 42452779 is about 6515.5797132719. The cubic root of 42452779 is about 348.8473071996.

The spelling of 42452779 in words is "forty-two million, four hundred fifty-two thousand, seven hundred seventy-nine".