1268885449 has 4 divisors (see below), whose sum is σ = 1366492036. Its totient is φ = 1171278864.

The previous prime is 1268885441. The next prime is 1268885467. The reversal of 1268885449 is 9445888621.

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

It can be written as a sum of positive squares in 2 ways, for example, as 799079824 + 469805625 = 28268^2 + 21675^2 .

It is a cyclic number.

It is not a de Polignac number, because 1268885449 - 2³ = 1268885441 is a prime.

It is a super-2 number, since 2×1268885449² = 3220140565367863202, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1268885449.

It is not an unprimeable number, because it can be changed into a prime (1268885441) 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, 48803274 + ... + 48803299.

It is an arithmetic number, because the mean of its divisors is an integer number (341623009).

Almost surely, 2^1268885449 is an apocalyptic number.

It is an amenable number.

1268885449 is a deficient number, since it is larger than the sum of its proper divisors (97606587).

1268885449 is an equidigital number, since it uses as much as digits as its factorization.

1268885449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97606586.

The product of its digits is 4423680, while the sum is 55.

The square root of 1268885449 is about 35621.4184024163. The cubic root of 1268885449 is about 1082.6152466519.

The spelling of 1268885449 in words is "one billion, two hundred sixty-eight million, eight hundred eighty-five thousand, four hundred forty-nine".