2135897 has 4 divisors (see below), whose sum is σ = 2261556. Its totient is φ = 2010240.

The previous prime is 2135891. The next prime is 2135909. The reversal of 2135897 is 7985312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 978121 + 1157776 = 989^2 + 1076^2 .

It is a cyclic number.

It is not a de Polignac number, because 2135897 - 2⁸ = 2135641 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 1 + 3⁹ + 5³ + 8⁷ + 9² + 7⁵ .

It is a Duffinian number.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (2135891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 62804 + ... + 62837.

It is an arithmetic number, because the mean of its divisors is an integer number (565389).

2^2135897 is an apocalyptic number.

It is an amenable number.

2135897 is a deficient number, since it is larger than the sum of its proper divisors (125659).

2135897 is a wasteful number, since it uses less digits than its factorization.

2135897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125658.

The product of its digits is 15120, while the sum is 35.

The square root of 2135897 is about 1461.4708344678. The cubic root of 2135897 is about 128.7834638249.

The spelling of 2135897 in words is "two million, one hundred thirty-five thousand, eight hundred ninety-seven".