3612905 has 4 divisors (see below), whose sum is σ = 4335492. Its totient is φ = 2890320.

The previous prime is 3612899. The next prime is 3612919. The reversal of 3612905 is 5092163.

3612905 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5092163 = 17 ⋅299539.

It can be written as a sum of positive squares in 2 ways, for example, as 2859481 + 753424 = 1691^2 + 868^2 .

It is not a de Polignac number, because 3612905 - 2¹⁴ = 3596521 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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, 361286 + ... + 361295.

It is an arithmetic number, because the mean of its divisors is an integer number (1083873).

Almost surely, 2^3612905 is an apocalyptic number.

It is an amenable number.

3612905 is a deficient number, since it is larger than the sum of its proper divisors (722587).

3612905 is an equidigital number, since it uses as much as digits as its factorization.

3612905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722586.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 3612905 is about 1900.7643199513. The cubic root of 3612905 is about 153.4448018490. Note that the first 3 decimals are identical.

The spelling of 3612905 in words is "three million, six hundred twelve thousand, nine hundred five".