1391959 has 8 divisors (see below), whose sum is σ = 1490480. Its totient is φ = 1296000.

The previous prime is 1391941. The next prime is 1391969. The reversal of 1391959 is 9591931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1391959 - 2⁵ = 1391927 is a prime.

It is a Duffinian number.

1391959 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391969) 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 in 7 ways as a sum of consecutive naturals, for example, 559 + ... + 1759.

It is an arithmetic number, because the mean of its divisors is an integer number (186310).

2^1391959 is an apocalyptic number.

1391959 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1391959 is a deficient number, since it is larger than the sum of its proper divisors (98521).

1391959 is a wasteful number, since it uses less digits than its factorization.

1391959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1281.

The product of its digits is 10935, while the sum is 37.

The square root of 1391959 is about 1179.8131207950. The cubic root of 1391959 is about 111.6543071888.

The spelling of 1391959 in words is "one million, three hundred ninety-one thousand, nine hundred fifty-nine".