842645 has 8 divisors (see below), whose sum is σ = 1019904. Its totient is φ = 668304.

The previous prime is 842627. The next prime is 842657. The reversal of 842645 is 546248.

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 842645 - 2⁶ = 842581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29 + ... + 1298.

It is an arithmetic number, because the mean of its divisors is an integer number (127488).

2⁸⁴²⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

842645 is a deficient number, since it is larger than the sum of its proper divisors (177259).

842645 is a wasteful number, since it uses less digits than its factorization.

842645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459.

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

The square root of 842645 is about 917.9569706691. The cubic root of 842645 is about 94.4528099728.

The spelling of 842645 in words is "eight hundred forty-two thousand, six hundred forty-five".