801646 has 4 divisors (see below), whose sum is σ = 1202472. Its totient is φ = 400822.

The previous prime is 801641. The next prime is 801677. The reversal of 801646 is 646108.

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

It is a self number, because there is not a number n which added to its sum of digits gives 801646.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200410 + ... + 200413.

It is an arithmetic number, because the mean of its divisors is an integer number (300618).

2⁸⁰¹⁶⁴⁶ is an apocalyptic number.

801646 is a deficient number, since it is larger than the sum of its proper divisors (400826).

801646 is a wasteful number, since it uses less digits than its factorization.

801646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400825.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 801646 is about 895.3468601609. The cubic root of 801646 is about 92.8954001839.

The spelling of 801646 in words is "eight hundred one thousand, six hundred forty-six".