12277381 has 2 divisors, whose sum is σ = 12277382. Its totient is φ = 12277380.

The previous prime is 12277379. The next prime is 12277393. The reversal of 12277381 is 18377221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11621281 + 656100 = 3409^2 + 810^2 .

It is a cyclic number.

It is not a de Polignac number, because 12277381 - 2¹ = 12277379 is a prime.

It is a super-2 number, since 2×12277381² = 301468168438322, which contains 22 as substring.

Together with 12277379, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12277301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6138690 + 6138691.

It is an arithmetic number, because the mean of its divisors is an integer number (6138691).

Almost surely, 2^12277381 is an apocalyptic number.

It is an amenable number.

12277381 is a deficient number, since it is larger than the sum of its proper divisors (1).

12277381 is an equidigital number, since it uses as much as digits as its factorization.

12277381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4704, while the sum is 31.

The square root of 12277381 is about 3503.9093880978. The cubic root of 12277381 is about 230.6934396607.

The spelling of 12277381 in words is "twelve million, two hundred seventy-seven thousand, three hundred eighty-one".