805642 has 8 divisors (see below), whose sum is σ = 1224000. Its totient is φ = 397644.

The previous prime is 805639. The next prime is 805687. The reversal of 805642 is 246508.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2392 + ... + 2707.

It is an arithmetic number, because the mean of its divisors is an integer number (153000).

2⁸⁰⁵⁶⁴² is an apocalyptic number.

805642 is a deficient number, since it is larger than the sum of its proper divisors (418358).

805642 is a wasteful number, since it uses less digits than its factorization.

805642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5180.

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 805642 is about 897.5756235549. The cubic root of 805642 is about 93.0494976808.

The spelling of 805642 in words is "eight hundred five thousand, six hundred forty-two".