801549 has 16 divisors (see below), whose sum is σ = 1357440. Its totient is φ = 457920.

The previous prime is 801539. The next prime is 801551. The reversal of 801549 is 945108.

801549 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 801549 - 2⁵ = 801517 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

801549 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (801539) 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, 1932 + ... + 2309.

It is an arithmetic number, because the mean of its divisors is an integer number (84840).

2⁸⁰¹⁵⁴⁹ is an apocalyptic number.

It is an amenable number.

801549 is a deficient number, since it is larger than the sum of its proper divisors (555891).

801549 is a wasteful number, since it uses less digits than its factorization.

801549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4257 (or 4251 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 801549 is about 895.2926895714. The cubic root of 801549 is about 92.8916532194.

The spelling of 801549 in words is "eight hundred one thousand, five hundred forty-nine".