845220 has 24 divisors (see below), whose sum is σ = 2366784. Its totient is φ = 225376.

The previous prime is 845219. The next prime is 845231. The reversal of 845220 is 22548.

845220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 6984 + ... + 7103.

It is an arithmetic number, because the mean of its divisors is an integer number (98616).

2⁸⁴⁵²²⁰ is an apocalyptic number.

It is an amenable number.

845220 is an abundant number, since it is smaller than the sum of its proper divisors (1521564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

845220 is a wasteful number, since it uses less digits than its factorization.

845220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14099 (or 14097 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 845220 is about 919.3584719792. The cubic root of 845220 is about 94.5489234652.

Adding to 845220 its reverse (22548), we get a palindrome (867768).

The spelling of 845220 in words is "eight hundred forty-five thousand, two hundred twenty".