1268539 has 4 divisors (see below), whose sum is σ = 1271160. Its totient is φ = 1265920.

The previous prime is 1268537. The next prime is 1268549. The reversal of 1268539 is 9358621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1268539 - 2¹ = 1268537 is a prime.

It is a Duffinian number.

1268539 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1268537) 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 3 ways as a sum of consecutive naturals, for example, 349 + ... + 1630.

It is an arithmetic number, because the mean of its divisors is an integer number (317790).

2^1268539 is an apocalyptic number.

1268539 is a deficient number, since it is larger than the sum of its proper divisors (2621).

1268539 is an equidigital number, since it uses as much as digits as its factorization.

1268539 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2620.

The product of its digits is 12960, while the sum is 34.

The square root of 1268539 is about 1126.2943664957. The cubic root of 1268539 is about 108.2516707389.

The spelling of 1268539 in words is "one million, two hundred sixty-eight thousand, five hundred thirty-nine".