5420209 has 4 divisors (see below), whose sum is σ = 5439780. Its totient is φ = 5400640.

The previous prime is 5420179. The next prime is 5420213. The reversal of 5420209 is 9020245.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3717184 + 1703025 = 1928^2 + 1305^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5420209 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 5420209.

It is not an unprimeable number, because it can be changed into a prime (5420309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9364 + ... + 9925.

It is an arithmetic number, because the mean of its divisors is an integer number (1359945).

Almost surely, 2^5420209 is an apocalyptic number.

It is an amenable number.

5420209 is a deficient number, since it is larger than the sum of its proper divisors (19571).

5420209 is a wasteful number, since it uses less digits than its factorization.

5420209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19570.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 5420209 is about 2328.1342315253. The cubic root of 5420209 is about 175.6596491541.

The spelling of 5420209 in words is "five million, four hundred twenty thousand, two hundred nine".