1326391 has 16 divisors (see below), whose sum is σ = 1578528. Its totient is φ = 1100800.

The previous prime is 1326389. The next prime is 1326419. The reversal of 1326391 is 1936231.

It is a cyclic number.

It is not a de Polignac number, because 1326391 - 2¹ = 1326389 is a prime.

It is a Duffinian number.

1326391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326301) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7581 + ... + 7753.

It is an arithmetic number, because the mean of its divisors is an integer number (98658).

2^1326391 is an apocalyptic number.

1326391 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1326391 is a deficient number, since it is larger than the sum of its proper divisors (252137).

1326391 is a wasteful number, since it uses less digits than its factorization.

1326391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242.

The product of its digits is 972, while the sum is 25.

The square root of 1326391 is about 1151.6904966179. The cubic root of 1326391 is about 109.8728834631.

The spelling of 1326391 in words is "one million, three hundred twenty-six thousand, three hundred ninety-one".