12981237 has 16 divisors (see below), whose sum is σ = 18567360. Its totient is φ = 8042112.

The previous prime is 12981233. The next prime is 12981253. The reversal of 12981237 is 73218921.

It is not a de Polignac number, because 12981237 - 2² = 12981233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12981198 and 12981207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12981233) 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 15 ways as a sum of consecutive naturals, for example, 873 + ... + 5169.

It is an arithmetic number, because the mean of its divisors is an integer number (1160460).

Almost surely, 2^12981237 is an apocalyptic number.

It is an amenable number.

12981237 is a deficient number, since it is larger than the sum of its proper divisors (5586123).

12981237 is a wasteful number, since it uses less digits than its factorization.

12981237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4372.

The product of its digits is 6048, while the sum is 33.

The square root of 12981237 is about 3602.9483759832. The cubic root of 12981237 is about 235.0202909897.

The spelling of 12981237 in words is "twelve million, nine hundred eighty-one thousand, two hundred thirty-seven".