12047381 has 6 divisors (see below), whose sum is σ = 12178146. Its totient is φ = 11918000.

The previous prime is 12047363. The next prime is 12047393. The reversal of 12047381 is 18374021.

It can be written as a sum of positive squares in 3 ways, for example, as 10666756 + 1380625 = 3266^2 + 1175^2 .

It is not a de Polignac number, because 12047381 - 2¹⁸ = 11785237 is a prime.

It is a super-2 number, since 2×12047381² = 290278777918322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12047381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12047341) 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 in 5 ways as a sum of consecutive naturals, for example, 9611 + ... + 10791.

It is an arithmetic number, because the mean of its divisors is an integer number (2029691).

Almost surely, 2^12047381 is an apocalyptic number.

It is an amenable number.

12047381 is a deficient number, since it is larger than the sum of its proper divisors (130765).

12047381 is an equidigital number, since it uses as much as digits as its factorization.

12047381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1383 (or 1282 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 12047381 is about 3470.9337360428. The cubic root of 12047381 is about 229.2437733848.

The spelling of 12047381 in words is "twelve million, forty-seven thousand, three hundred eighty-one".