1213439 has 2 divisors, whose sum is σ = 1213440. Its totient is φ = 1213438.

The previous prime is 1213427. The next prime is 1213451. The reversal of 1213439 is 9343121.

It is a balanced prime because it is at equal distance from previous prime (1213427) and next prime (1213451).

It is a cyclic number.

It is not a de Polignac number, because 1213439 - 2⁸ = 1213183 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 (1213469) 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, 606719 + 606720.

It is an arithmetic number, because the mean of its divisors is an integer number (606720).

2^1213439 is an apocalyptic number.

1213439 is a deficient number, since it is larger than the sum of its proper divisors (1).

1213439 is an equidigital number, since it uses as much as digits as its factorization.

1213439 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 648, while the sum is 23.

The square root of 1213439 is about 1101.5620726950. The cubic root of 1213439 is about 106.6610815218.

The spelling of 1213439 in words is "one million, two hundred thirteen thousand, four hundred thirty-nine".