1268513 has 4 divisors (see below), whose sum is σ = 1272240. Its totient is φ = 1264788.

The previous prime is 1268479. The next prime is 1268537. The reversal of 1268513 is 3158621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3158621 = 31 ⋅101891.

It is a cyclic number.

It is not a de Polignac number, because 1268513 - 2¹⁴ = 1252129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1268563) 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, 1295 + ... + 2052.

It is an arithmetic number, because the mean of its divisors is an integer number (318060).

2^1268513 is an apocalyptic number.

It is an amenable number.

1268513 is a deficient number, since it is larger than the sum of its proper divisors (3727).

1268513 is an equidigital number, since it uses as much as digits as its factorization.

1268513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3726.

The product of its digits is 1440, while the sum is 26.

The square root of 1268513 is about 1126.2828241610. The cubic root of 1268513 is about 108.2509311577.

The spelling of 1268513 in words is "one million, two hundred sixty-eight thousand, five hundred thirteen".