842442457 has 8 divisors (see below), whose sum is σ = 863678592. Its totient is φ = 821239200.

The previous prime is 842442451. The next prime is 842442467. The reversal of 842442457 is 754244248.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 842442457 - 2³ = 842442449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (842442451) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48532 + ... + 63562.

It is an arithmetic number, because the mean of its divisors is an integer number (107959824).

Almost surely, 2^842442457 is an apocalyptic number.

It is an amenable number.

842442457 is a deficient number, since it is larger than the sum of its proper divisors (21236135).

842442457 is a wasteful number, since it uses less digits than its factorization.

842442457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16439.

The product of its digits is 286720, while the sum is 40.

The square root of 842442457 is about 29024.8592933713. The cubic root of 842442457 is about 944.4524162613.

The spelling of 842442457 in words is "eight hundred forty-two million, four hundred forty-two thousand, four hundred fifty-seven".