1212839 has 2 divisors, whose sum is σ = 1212840. Its totient is φ = 1212838.

The previous prime is 1212817. The next prime is 1212847. The reversal of 1212839 is 9382121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1212839 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 (1212889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606419 + 606420.

It is an arithmetic number, because the mean of its divisors is an integer number (606420).

2^1212839 is an apocalyptic number.

1212839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212839 is an equidigital number, since it uses as much as digits as its factorization.

1212839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 26.

The square root of 1212839 is about 1101.2896984899. The cubic root of 1212839 is about 106.6434986575.

It can be divided in two parts, 12128 and 39, that added together give a cube (12167 = 23³).

The spelling of 1212839 in words is "one million, two hundred twelve thousand, eight hundred thirty-nine".