1378859 has 2 divisors, whose sum is σ = 1378860. Its totient is φ = 1378858.

The previous prime is 1378847. The next prime is 1378903. The reversal of 1378859 is 9588731.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1378859 - 2⁴ = 1378843 is a prime.

It is not a weakly prime, because it can be changed into another prime (1378759) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 689429 + 689430.

It is an arithmetic number, because the mean of its divisors is an integer number (689430).

2^1378859 is an apocalyptic number.

1378859 is a deficient number, since it is larger than the sum of its proper divisors (1).

1378859 is an equidigital number, since it uses as much as digits as its factorization.

1378859 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 41.

The square root of 1378859 is about 1174.2482701712. The cubic root of 1378859 is about 111.3029357134.

The spelling of 1378859 in words is "one million, three hundred seventy-eight thousand, eight hundred fifty-nine".