42789451 has 4 divisors (see below), whose sum is σ = 43011352. Its totient is φ = 42567552.

The previous prime is 42789443. The next prime is 42789469. The reversal of 42789451 is 15498724.

42789451 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.

It is a cyclic number.

It is not a de Polignac number, because 42789451 - 2³ = 42789443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42789401) 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, 110661 + ... + 111046.

It is an arithmetic number, because the mean of its divisors is an integer number (10752838).

Almost surely, 2^42789451 is an apocalyptic number.

42789451 is a deficient number, since it is larger than the sum of its proper divisors (221901).

42789451 is a wasteful number, since it uses less digits than its factorization.

42789451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221900.

The product of its digits is 80640, while the sum is 40.

The square root of 42789451 is about 6541.3646129841. The cubic root of 42789451 is about 349.7670586064.

The spelling of 42789451 in words is "forty-two million, seven hundred eighty-nine thousand, four hundred fifty-one".