1268564461 has 4 divisors (see below), whose sum is σ = 1268784000. Its totient is φ = 1268344924.

The previous prime is 1268564459. The next prime is 1268564467. The reversal of 1268564461 is 1644658621.

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.

It is a cyclic number.

It is not a de Polignac number, because 1268564461 - 2¹ = 1268564459 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1268564467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 100861 + ... + 112738.

It is an arithmetic number, because the mean of its divisors is an integer number (317196000).

Almost surely, 2^1268564461 is an apocalyptic number.

It is an amenable number.

1268564461 is a deficient number, since it is larger than the sum of its proper divisors (219539).

1268564461 is an equidigital number, since it uses as much as digits as its factorization.

1268564461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219538.

The product of its digits is 276480, while the sum is 43.

The square root of 1268564461 is about 35616.9125697329. The cubic root of 1268564461 is about 1082.5239497819.

The spelling of 1268564461 in words is "one billion, two hundred sixty-eight million, five hundred sixty-four thousand, four hundred sixty-one".