12133720 has 32 divisors (see below), whose sum is σ = 27483120. Its totient is φ = 4821120.

The previous prime is 12133711. The next prime is 12133721. The reversal of 12133720 is 2733121.

It is a super-2 number, since 2×12133720² = 294454322076800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12133721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5590 + ... + 7450.

Almost surely, 2^12133720 is an apocalyptic number.

12133720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12133720 is an abundant number, since it is smaller than the sum of its proper divisors (15349400).

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

12133720 is a wasteful number, since it uses less digits than its factorization.

12133720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2035 (or 2031 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 12133720 is about 3483.3489632823. The cubic root of 12133720 is about 229.7901046665.

Adding to 12133720 its reverse (2733121), we get a palindrome (14866841).

The spelling of 12133720 in words is "twelve million, one hundred thirty-three thousand, seven hundred twenty".