842545 has 8 divisors (see below), whose sum is σ = 1103040. Its totient is φ = 612720.

The previous prime is 842531. The next prime is 842551. The reversal of 842545 is 545248.

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

It is not a de Polignac number, because 842545 - 2⁷ = 842417 is a prime.

It is a plaindrome in base 15.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7605 + ... + 7714.

It is an arithmetic number, because the mean of its divisors is an integer number (137880).

2⁸⁴²⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

842545 is a deficient number, since it is larger than the sum of its proper divisors (260495).

842545 is a wasteful number, since it uses less digits than its factorization.

842545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15335.

The product of its digits is 6400, while the sum is 28.

The square root of 842545 is about 917.9025002690. The cubic root of 842545 is about 94.4490734627.

The spelling of 842545 in words is "eight hundred forty-two thousand, five hundred forty-five".