842546 has 4 divisors (see below), whose sum is σ = 1263822. Its totient is φ = 421272.

The previous prime is 842531. The next prime is 842551. The reversal of 842546 is 645248.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 469225 + 373321 = 685^2 + 611^2 .

It is a Curzon number.

It is a plaindrome in base 15.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 842546.

It is an unprimeable number.

842546 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 as a sum of consecutive naturals, namely, 210635 + ... + 210638.

2⁸⁴²⁵⁴⁶ is an apocalyptic number.

842546 is a deficient number, since it is larger than the sum of its proper divisors (421276).

842546 is a wasteful number, since it uses less digits than its factorization.

842546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421275.

The product of its digits is 7680, while the sum is 29.

The square root of 842546 is about 917.9030449890. The cubic root of 842546 is about 94.4491108293.

The spelling of 842546 in words is "eight hundred forty-two thousand, five hundred forty-six".