2212405 has 16 divisors (see below), whose sum is σ = 2895984. Its totient is φ = 1612800.

The previous prime is 2212391. The next prime is 2212421. The reversal of 2212405 is 5042122.

It can be written as a sum of positive squares in 8 ways, for example, as 19044 + 2193361 = 138^2 + 1481^2 .

It is not a de Polignac number, because 2212405 - 2⁷ = 2212277 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6397 + ... + 6733.

It is an arithmetic number, because the mean of its divisors is an integer number (180999).

2^2212405 is an apocalyptic number.

It is an amenable number.

2212405 is a deficient number, since it is larger than the sum of its proper divisors (683579).

2212405 is a wasteful number, since it uses less digits than its factorization.

2212405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 456.

The product of its (nonzero) digits is 160, while the sum is 16.

The square root of 2212405 is about 1487.4155438209. The cubic root of 2212405 is about 130.3031387345.

Adding to 2212405 its reverse (5042122), we get a palindrome (7254527).

The spelling of 2212405 in words is "two million, two hundred twelve thousand, four hundred five".