1361839 has 2 divisors, whose sum is σ = 1361840. Its totient is φ = 1361838.

The previous prime is 1361831. The next prime is 1361849. The reversal of 1361839 is 9381631.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1361839 - 2³ = 1361831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1361839.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1361831) 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, 680919 + 680920.

It is an arithmetic number, because the mean of its divisors is an integer number (680920).

2^1361839 is an apocalyptic number.

1361839 is a deficient number, since it is larger than the sum of its proper divisors (1).

1361839 is an equidigital number, since it uses as much as digits as its factorization.

1361839 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3888, while the sum is 31.

The square root of 1361839 is about 1166.9785773526. The cubic root of 1361839 is about 110.8430810329.

The spelling of 1361839 in words is "one million, three hundred sixty-one thousand, eight hundred thirty-nine".