801645 has 16 divisors (see below), whose sum is σ = 1381632. Its totient is φ = 394560.

The previous prime is 801641. The next prime is 801677. The reversal of 801645 is 546108.

It is not a de Polignac number, because 801645 - 2² = 801641 is a prime.

It is a super-3 number, since 3×801645³ = 1545494696734233375, which contains 333 as substring.

It is a Curzon number.

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 in 15 ways as a sum of consecutive naturals, for example, 1861 + ... + 2250.

It is an arithmetic number, because the mean of its divisors is an integer number (86352).

2⁸⁰¹⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

801645 is a deficient number, since it is larger than the sum of its proper divisors (579987).

801645 is a wasteful number, since it uses less digits than its factorization.

801645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4132.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 801645 is about 895.3463017179. The cubic root of 801645 is about 92.8953615569.

The spelling of 801645 in words is "eight hundred one thousand, six hundred forty-five".