12922381 has 4 divisors (see below), whose sum is σ = 13339264. Its totient is φ = 12505500.

The previous prime is 12922373. The next prime is 12922409. The reversal of 12922381 is 18322921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 18322921 = 839 ⋅21839.

It is a cyclic number.

It is not a de Polignac number, because 12922381 - 2³ = 12922373 is a prime.

It is a super-2 number, since 2×12922381² = 333975861418322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12922681) 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 3 ways as a sum of consecutive naturals, for example, 208395 + ... + 208456.

It is an arithmetic number, because the mean of its divisors is an integer number (3334816).

Almost surely, 2^12922381 is an apocalyptic number.

It is an amenable number.

12922381 is a deficient number, since it is larger than the sum of its proper divisors (416883).

12922381 is an equidigital number, since it uses as much as digits as its factorization.

12922381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416882.

The product of its digits is 1728, while the sum is 28.

The square root of 12922381 is about 3594.7713418241. The cubic root of 12922381 is about 234.6645644379.

The spelling of 12922381 in words is "twelve million, nine hundred twenty-two thousand, three hundred eighty-one".