1236397 has 2 divisors, whose sum is σ = 1236398. Its totient is φ = 1236396.

The previous prime is 1236383. The next prime is 1236419. The reversal of 1236397 is 7936321.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1142761 + 93636 = 1069^2 + 306^2 .

It is a cyclic number.

It is not a de Polignac number, because 1236397 - 2¹¹ = 1234349 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1236307) 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, 618198 + 618199.

It is an arithmetic number, because the mean of its divisors is an integer number (618199).

2^1236397 is an apocalyptic number.

It is an amenable number.

1236397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1236397 is an equidigital number, since it uses as much as digits as its factorization.

1236397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 31.

The square root of 1236397 is about 1111.9339009132. The cubic root of 1236397 is about 107.3295514101.

The spelling of 1236397 in words is "one million, two hundred thirty-six thousand, three hundred ninety-seven".