2136321 has 16 divisors (see below), whose sum is σ = 3453120. Its totient is φ = 1294560.

The previous prime is 2136313. The next prime is 2136347. The reversal of 2136321 is 1236312.

It is not a de Polignac number, because 2136321 - 2³ = 2136313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2136294 and 2136303.

It is not an unprimeable number, because it can be changed into a prime (2136301) 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, 3300 + ... + 3893.

It is an arithmetic number, because the mean of its divisors is an integer number (215820).

2^2136321 is an apocalyptic number.

It is an amenable number.

2136321 is a deficient number, since it is larger than the sum of its proper divisors (1316799).

2136321 is a wasteful number, since it uses less digits than its factorization.

2136321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7213 (or 7207 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 2136321 is about 1461.6158866132. The cubic root of 2136321 is about 128.7919849249.

Subtracting from 2136321 its reverse (1236312), we obtain a palindrome (900009).

The spelling of 2136321 in words is "two million, one hundred thirty-six thousand, three hundred twenty-one".