12278137 has 2 divisors, whose sum is σ = 12278138. Its totient is φ = 12278136.

The previous prime is 12278129. The next prime is 12278153. The reversal of 12278137 is 73187221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12278016 + 121 = 3504^2 + 11^2 .

It is a cyclic number.

It is not a de Polignac number, because 12278137 - 2³ = 12278129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12278099 and 12278108.

It is not a weakly prime, because it can be changed into another prime (12278537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6139068 + 6139069.

It is an arithmetic number, because the mean of its divisors is an integer number (6139069).

Almost surely, 2^12278137 is an apocalyptic number.

It is an amenable number.

12278137 is a deficient number, since it is larger than the sum of its proper divisors (1).

12278137 is an equidigital number, since it uses as much as digits as its factorization.

12278137 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 12278137 is about 3504.0172659392. The cubic root of 12278137 is about 230.6981746732.

The spelling of 12278137 in words is "twelve million, two hundred seventy-eight thousand, one hundred thirty-seven".