905420 has 24 divisors (see below), whose sum is σ = 2013984. Its totient is φ = 340736.

The previous prime is 905413. The next prime is 905449. The reversal of 905420 is 24509.

905420 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 905392 and 905401.

It is an unprimeable number.

905420 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 992 + ... + 1671.

It is an arithmetic number, because the mean of its divisors is an integer number (83916).

2⁹⁰⁵⁴²⁰ is an apocalyptic number.

It is an amenable number.

905420 is an abundant number, since it is smaller than the sum of its proper divisors (1108564).

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

905420 is a wasteful number, since it uses less digits than its factorization.

905420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2689 (or 2687 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 905420 is about 951.5356010155. The cubic root of 905420 is about 96.7423637495.

Adding to 905420 its reverse (24509), we get a palindrome (929929).

The spelling of 905420 in words is "nine hundred five thousand, four hundred twenty".