842457 has 24 divisors (see below), whose sum is σ = 1428192. Its totient is φ = 436800.

The previous prime is 842449. The next prime is 842473. The reversal of 842457 is 754248.

It is not a de Polignac number, because 842457 - 2³ = 842449 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 842457.

It is not an unprimeable number, because it can be changed into a prime (842407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1357 + ... + 1877.

It is an arithmetic number, because the mean of its divisors is an integer number (59508).

2⁸⁴²⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

842457 is a deficient number, since it is larger than the sum of its proper divisors (585735).

842457 is a wasteful number, since it uses less digits than its factorization.

842457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 549 (or 542 counting only the distinct ones).

The product of its digits is 8960, while the sum is 30.

The square root of 842457 is about 917.8545636428. The cubic root of 842457 is about 94.4457850893.

Subtracting from 842457 its reverse (754248), we obtain a square (88209 = 297²).

The spelling of 842457 in words is "eight hundred forty-two thousand, four hundred fifty-seven".