2133645 has 16 divisors (see below), whose sum is σ = 3449472. Its totient is φ = 1126080.

The previous prime is 2133631. The next prime is 2133647. The reversal of 2133645 is 5463312.

It is a happy number.

2133645 is nontrivially palindromic in base 14.

It is not a de Polignac number, because 2133645 - 2⁵ = 2133613 is a prime.

It is a super-3 number, since 3×2133645³ = 29139878842881933375, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2133647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 855 + ... + 2235.

It is an arithmetic number, because the mean of its divisors is an integer number (215592).

2^2133645 is an apocalyptic number.

It is an amenable number.

2133645 is a deficient number, since it is larger than the sum of its proper divisors (1315827).

2133645 is a wasteful number, since it uses less digits than its factorization.

2133645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1492.

The product of its digits is 2160, while the sum is 24.

The square root of 2133645 is about 1460.7001745738. The cubic root of 2133645 is about 128.7381866184.

Adding to 2133645 its reverse (5463312), we get a palindrome (7596957).

The spelling of 2133645 in words is "two million, one hundred thirty-three thousand, six hundred forty-five".