1269663255 has 120 divisors (see below), whose sum is σ = 2672615088. Its totient is φ = 574947072.

The previous prime is 1269663253. The next prime is 1269663257. The reversal of 1269663255 is 5523669621.

1269663255 is a `hidden beast` number, since 1 + 2 + 6 + 9 + 6 + 632 + 5 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (1269663253) and next prime (1269663257).

It is not a de Polignac number, because 1269663255 - 2¹ = 1269663253 is a prime.

It is a super-2 number, since 2×1269663255² = 3224089562194390050, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 1269663255.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1269663253) by changing a digit.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 2718532 + ... + 2718998.

Almost surely, 2^1269663255 is an apocalyptic number.

1269663255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1269663255 is an abundant number, since it is smaller than the sum of its proper divisors (1402951833).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1269663255 is a wasteful number, since it uses less digits than its factorization.

1269663255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 635 (or 619 counting only the distinct ones).

The product of its digits is 583200, while the sum is 45.

The square root of 1269663255 is about 35632.3344028987. The cubic root of 1269663255 is about 1082.8364099404.

The spelling of 1269663255 in words is "one billion, two hundred sixty-nine million, six hundred sixty-three thousand, two hundred fifty-five".