2165420 has 12 divisors (see below), whose sum is σ = 4547424. Its totient is φ = 866160.

The previous prime is 2165413. The next prime is 2165453. The reversal of 2165420 is 245612.

It is a happy number.

2165420 is digitally balanced in base 5, 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), and also a Moran number because the ratio is a prime number: 108271 = 2165420 / (2 + 1 + 6 + 5 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 2165392 and 2165401.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54116 + ... + 54155.

It is an arithmetic number, because the mean of its divisors is an integer number (378952).

2^2165420 is an apocalyptic number.

2165420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2165420 is an abundant number, since it is smaller than the sum of its proper divisors (2382004).

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

2165420 is a wasteful number, since it uses less digits than its factorization.

2165420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108280 (or 108278 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2165420 is about 1471.5366118449. The cubic root of 2165420 is about 129.3741117974.

The spelling of 2165420 in words is "two million, one hundred sixty-five thousand, four hundred twenty".