1335391 has 2 divisors, whose sum is σ = 1335392. Its totient is φ = 1335390.

The previous prime is 1335379. The next prime is 1335407. The reversal of 1335391 is 1935331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1335391 - 2¹³ = 1327199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1335331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 667695 + 667696.

It is an arithmetic number, because the mean of its divisors is an integer number (667696).

2^1335391 is an apocalyptic number.

1335391 is a deficient number, since it is larger than the sum of its proper divisors (1).

1335391 is an equidigital number, since it uses as much as digits as its factorization.

1335391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1215, while the sum is 25.

The square root of 1335391 is about 1155.5911906899. The cubic root of 1335391 is about 110.1208314094.

It can be divided in two parts, 133 and 5391, that multiplied together give a triangular number (717003 = T₁₁₉₇).

The spelling of 1335391 in words is "one million, three hundred thirty-five thousand, three hundred ninety-one".