2135391 has 8 divisors (see below), whose sum is σ = 2997120. Its totient is φ = 1348632.

The previous prime is 2135383. The next prime is 2135401. The reversal of 2135391 is 1935312.

It is a happy number.

2135391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2135391 - 2³ = 2135383 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2135191) 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 7 ways as a sum of consecutive naturals, for example, 18675 + ... + 18788.

It is an arithmetic number, because the mean of its divisors is an integer number (374640).

2^2135391 is an apocalyptic number.

2135391 is a deficient number, since it is larger than the sum of its proper divisors (861729).

2135391 is a wasteful number, since it uses less digits than its factorization.

2135391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37485.

The product of its digits is 810, while the sum is 24.

The square root of 2135391 is about 1461.2977109405. The cubic root of 2135391 is about 128.7732933002.

The spelling of 2135391 in words is "two million, one hundred thirty-five thousand, three hundred ninety-one".