1359991 has 2 divisors, whose sum is σ = 1359992. Its totient is φ = 1359990.

The previous prime is 1359979. The next prime is 1359997. The reversal of 1359991 is 1999531.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1359991 - 2⁵ = 1359959 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1359991.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1359997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 679995 + 679996.

It is an arithmetic number, because the mean of its divisors is an integer number (679996).

2^1359991 is an apocalyptic number.

1359991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1359991 is an equidigital number, since it uses as much as digits as its factorization.

1359991 is an evil number, because the sum of its binary digits is even.

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

The square root of 1359991 is about 1166.1865202445. The cubic root of 1359991 is about 110.7929207379.

The spelling of 1359991 in words is "one million, three hundred fifty-nine thousand, nine hundred ninety-one".