1210399 has 2 divisors, whose sum is σ = 1210400. Its totient is φ = 1210398.

The previous prime is 1210397. The next prime is 1210403. The reversal of 1210399 is 9930121.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1210399 - 2¹ = 1210397 is a prime.

Together with 1210397, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605199 + 605200.

It is an arithmetic number, because the mean of its divisors is an integer number (605200).

2^1210399 is an apocalyptic number.

1210399 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210399 is an equidigital number, since it uses as much as digits as its factorization.

1210399 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 1210399 is about 1100.1813486876. The cubic root of 1210399 is about 106.5719352074.

The spelling of 1210399 in words is "one million, two hundred ten thousand, three hundred ninety-nine".