12921233 has 12 divisors (see below), whose sum is σ = 14148828. Its totient is φ = 11793600.

The previous prime is 12921217. The next prime is 12921263. The reversal of 12921233 is 33212921.

It can be written as a sum of positive squares in 6 ways, for example, as 18769 + 12902464 = 137^2 + 3592^2 .

It is not a de Polignac number, because 12921233 - 2⁴ = 12921217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12921199 and 12921208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12921263) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16691 + ... + 17447.

It is an arithmetic number, because the mean of its divisors is an integer number (1179069).

Almost surely, 2^12921233 is an apocalyptic number.

12921233 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

12921233 is a deficient number, since it is larger than the sum of its proper divisors (1227595).

12921233 is a wasteful number, since it uses less digits than its factorization.

12921233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884 (or 871 counting only the distinct ones).

The product of its digits is 648, while the sum is 23.

The square root of 12921233 is about 3594.6116619184. The cubic root of 12921233 is about 234.6576151794.

The spelling of 12921233 in words is "twelve million, nine hundred twenty-one thousand, two hundred thirty-three".