842146257 has 4 divisors (see below), whose sum is σ = 1122861680. Its totient is φ = 561430836.

The previous prime is 842146247. The next prime is 842146301. The reversal of 842146257 is 752641248.

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.

It is not a de Polignac number, because 842146257 - 2⁸ = 842146001 is a prime.

It is a super-2 number, since 2×842146257² = 1418420636358220098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (842146247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140357707 + ... + 140357712.

It is an arithmetic number, because the mean of its divisors is an integer number (280715420).

Almost surely, 2^842146257 is an apocalyptic number.

It is an amenable number.

842146257 is a deficient number, since it is larger than the sum of its proper divisors (280715423).

842146257 is a wasteful number, since it uses less digits than its factorization.

842146257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280715422.

The product of its digits is 107520, while the sum is 39.

The square root of 842146257 is about 29019.7563222023. The cubic root of 842146257 is about 944.3417144973.

The spelling of 842146257 in words is "eight hundred forty-two million, one hundred forty-six thousand, two hundred fifty-seven".