2135869 has 4 divisors (see below), whose sum is σ = 2204800. Its totient is φ = 2066940.

The previous prime is 2135857. The next prime is 2135891. The reversal of 2135869 is 9685312.

2135869 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 a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2135869 - 2¹¹ = 2133821 is a prime.

It is a super-2 number, since 2×2135869² = 9123872770322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2135369) 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, 34419 + ... + 34480.

It is an arithmetic number, because the mean of its divisors is an integer number (551200).

2^2135869 is an apocalyptic number.

It is an amenable number.

2135869 is a deficient number, since it is larger than the sum of its proper divisors (68931).

2135869 is an equidigital number, since it uses as much as digits as its factorization.

2135869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68930.

The product of its digits is 12960, while the sum is 34.

The square root of 2135869 is about 1461.4612550458. The cubic root of 2135869 is about 128.7829010710.

The spelling of 2135869 in words is "two million, one hundred thirty-five thousand, eight hundred sixty-nine".