2135609 has 8 divisors (see below), whose sum is σ = 2475648. Its totient is φ = 1804320.

The previous prime is 2135597. The next prime is 2135611. The reversal of 2135609 is 9065312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2135609 - 2¹² = 2131513 is a prime.

It is a zygodrome in base 3.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2135669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1652 + ... + 2645.

It is an arithmetic number, because the mean of its divisors is an integer number (309456).

2^2135609 is an apocalyptic number.

It is an amenable number.

2135609 is a deficient number, since it is larger than the sum of its proper divisors (340039).

2135609 is an equidigital number, since it uses as much as digits as its factorization.

2135609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4375.

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

The square root of 2135609 is about 1461.3723002712. The cubic root of 2135609 is about 128.7776752647. Note that the first 3 decimals are identical.

It can be divided in two parts, 2135 and 609, that added together give a cube (2744 = 14³).

The spelling of 2135609 in words is "two million, one hundred thirty-five thousand, six hundred nine".