2135645 has 8 divisors (see below), whose sum is σ = 2588760. Its totient is φ = 1691200.

The previous prime is 2135641. The next prime is 2135663. The reversal of 2135645 is 5465312.

It can be written as a sum of positive squares in 4 ways, for example, as 1466521 + 669124 = 1211^2 + 818^2 .

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

It is not a de Polignac number, because 2135645 - 2² = 2135641 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 (2135641) 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, 1610 + ... + 2619.

It is an arithmetic number, because the mean of its divisors is an integer number (323595).

2^2135645 is an apocalyptic number.

It is an amenable number.

2135645 is a deficient number, since it is larger than the sum of its proper divisors (453115).

2135645 is a wasteful number, since it uses less digits than its factorization.

2135645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4335.

The product of its digits is 3600, while the sum is 26.

The square root of 2135645 is about 1461.3846174091. The cubic root of 2135645 is about 128.7783988632.

The spelling of 2135645 in words is "two million, one hundred thirty-five thousand, six hundred forty-five".