2131264 has 14 divisors (see below), whose sum is σ = 4229354. Its totient is φ = 1065600.

The previous prime is 2131253. The next prime is 2131267. The reversal of 2131264 is 4621312.

It can be written as a sum of positive squares in only one way, i.e., 1937664 + 193600 = 1392^2 + 440^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2131267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16587 + ... + 16714.

2^2131264 is an apocalyptic number.

It is an amenable number.

2131264 is a deficient number, since it is larger than the sum of its proper divisors (2098090).

2131264 is an equidigital number, since it uses as much as digits as its factorization.

2131264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33313 (or 33303 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 2131264 is about 1459.8849269720. The cubic root of 2131264 is about 128.6902811618.

Adding to 2131264 its reverse (4621312), we get a palindrome (6752576).

The spelling of 2131264 in words is "two million, one hundred thirty-one thousand, two hundred sixty-four".