1231199 has 2 divisors, whose sum is σ = 1231200. Its totient is φ = 1231198.

The previous prime is 1231193. The next prime is 1231201. The reversal of 1231199 is 9911321.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1231199 - 2¹² = 1227103 is a prime.

Together with 1231201, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1231193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 615599 + 615600.

It is an arithmetic number, because the mean of its divisors is an integer number (615600).

2^1231199 is an apocalyptic number.

1231199 is a deficient number, since it is larger than the sum of its proper divisors (1).

1231199 is an equidigital number, since it uses as much as digits as its factorization.

1231199 is an evil number, because the sum of its binary digits is even.

The product of its digits is 486, while the sum is 26.

The square root of 1231199 is about 1109.5940699193. The cubic root of 1231199 is about 107.1789302450.

The spelling of 1231199 in words is "one million, two hundred thirty-one thousand, one hundred ninety-nine".