12037381 has 4 divisors (see below), whose sum is σ = 12049452. Its totient is φ = 12025312.

The previous prime is 12037379. The next prime is 12037397. The reversal of 12037381 is 18373021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5062500 + 6974881 = 2250^2 + 2641^2 .

It is a cyclic number.

It is not a de Polignac number, because 12037381 - 2¹ = 12037379 is a prime.

It is a super-2 number, since 2×12037381² = 289797082678322, 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 (12037351) 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 3 ways as a sum of consecutive naturals, for example, 4390 + ... + 6583.

It is an arithmetic number, because the mean of its divisors is an integer number (3012363).

Almost surely, 2^12037381 is an apocalyptic number.

It is an amenable number.

12037381 is a deficient number, since it is larger than the sum of its proper divisors (12071).

12037381 is a wasteful number, since it uses less digits than its factorization.

12037381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12070.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 12037381 is about 3469.4929024282. The cubic root of 12037381 is about 229.1803274428.

The spelling of 12037381 in words is "twelve million, thirty-seven thousand, three hundred eighty-one".