1236398 has 4 divisors (see below), whose sum is σ = 1854600. Its totient is φ = 618198.

The previous prime is 1236397. The next prime is 1236419. The reversal of 1236398 is 8936321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8936321 = 29 ⋅308149.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1236397) 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, 309098 + ... + 309101.

It is an arithmetic number, because the mean of its divisors is an integer number (463650).

2^1236398 is an apocalyptic number.

1236398 is a deficient number, since it is larger than the sum of its proper divisors (618202).

1236398 is an equidigital number, since it uses as much as digits as its factorization.

1236398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 618201.

The product of its digits is 7776, while the sum is 32.

The square root of 1236398 is about 1111.9343505801. The cubic root of 1236398 is about 107.3295803462.

The spelling of 1236398 in words is "one million, two hundred thirty-six thousand, three hundred ninety-eight".