1268285769 has 21 divisors (see below), whose sum is σ = 1903001533. Its totient is φ = 844882812.

The previous prime is 1268285761. The next prime is 1268285779. The reversal of 1268285769 is 9675828621.

The square root of 1268285769 is 35613.

It is a perfect power (a square), and thus also a powerful number.

1268285769 is a `hidden beast` number, since 1 + 2 + 68 + 2 + 8 + 576 + 9 = 666.

It is not a de Polignac number, because 1268285769 - 2³ = 1268285761 is a prime.

It is a super-2 number, since 2×1268285769² = 3217097583695842722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1268285761) by changing a digit.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 960892 + ... + 962210.

Almost surely, 2^1268285769 is an apocalyptic number.

1268285769 is the 35613-rd square number.

1268285769 is the 17807-th centered octagonal number.

It is an amenable number.

1268285769 is a deficient number, since it is larger than the sum of its proper divisors (634715764).

1268285769 is an frugal number, since it uses more digits than its factorization.

1268285769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2656 (or 1322 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The cubic root of 1268285769 is about 1082.4446704417. Note that the first 3 decimals are identical.

The spelling of 1268285769 in words is "one billion, two hundred sixty-eight million, two hundred eighty-five thousand, seven hundred sixty-nine".