2131304 has 24 divisors (see below), whose sum is σ = 4649490. Its totient is φ = 913248.

The previous prime is 2131291. The next prime is 2131319. The reversal of 2131304 is 4031312.

It can be written as a sum of positive squares in only one way, i.e., 1768900 + 362404 = 1330^2 + 602^2 .

It is a Harshad number since it is a multiple of its sum of digits (14).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2327 + ... + 3110.

2^2131304 is an apocalyptic number.

It is an amenable number.

2131304 is an abundant number, since it is smaller than the sum of its proper divisors (2518186).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2131304 is a wasteful number, since it uses less digits than its factorization.

2131304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5457 (or 5446 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 2131304 is about 1459.8986266176. The cubic root of 2131304 is about 128.6910862520.

Adding to 2131304 its reverse (4031312), we get a palindrome (6162616).

The spelling of 2131304 in words is "two million, one hundred thirty-one thousand, three hundred four".