1905213 has 16 divisors (see below), whose sum is σ = 2678400. Its totient is φ = 1202880.

The previous prime is 1905199. The next prime is 1905247. The reversal of 1905213 is 3125091.

It is not a de Polignac number, because 1905213 - 2⁵ = 1905181 is a prime.

1905213 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1905213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1905283) 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 15 ways as a sum of consecutive naturals, for example, 5128 + ... + 5486.

It is an arithmetic number, because the mean of its divisors is an integer number (167400).

2^1905213 is an apocalyptic number.

It is an amenable number.

1905213 is a deficient number, since it is larger than the sum of its proper divisors (773187).

1905213 is a wasteful number, since it uses less digits than its factorization.

1905213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 1905213 is about 1380.2945337862. The cubic root of 1905213 is about 123.9694036547.

The spelling of 1905213 in words is "one million, nine hundred five thousand, two hundred thirteen".