1268591 has 4 divisors (see below), whose sum is σ = 1343232. Its totient is φ = 1193952.

The previous prime is 1268567. The next prime is 1268593. The reversal of 1268591 is 1958621.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1268591 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37295 + ... + 37328.

It is an arithmetic number, because the mean of its divisors is an integer number (335808).

2^1268591 is an apocalyptic number.

1268591 is a deficient number, since it is larger than the sum of its proper divisors (74641).

1268591 is an equidigital number, since it uses as much as digits as its factorization.

1268591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74640.

The product of its digits is 4320, while the sum is 32.

The square root of 1268591 is about 1126.3174508104. The cubic root of 1268591 is about 108.2531498709.

The spelling of 1268591 in words is "one million, two hundred sixty-eight thousand, five hundred ninety-one".