1263606256 has 40 divisors (see below), whose sum is σ = 2732932224. Its totient is φ = 561005760.

The previous prime is 1263606151. The next prime is 1263606259. The reversal of 1263606256 is 6526063621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263606259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 75916 + ... + 91051.

Almost surely, 2^1263606256 is an apocalyptic number.

1263606256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1263606256 is an abundant number, since it is smaller than the sum of its proper divisors (1469325968).

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

1263606256 is a wasteful number, since it uses less digits than its factorization.

1263606256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167029 (or 167023 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 37.

The square root of 1263606256 is about 35547.2397803261. The cubic root of 1263606256 is about 1081.1117541138. Note that the first 3 decimals are identical.

Adding to 1263606256 its reverse (6526063621), we get a palindrome (7789669877).

The spelling of 1263606256 in words is "one billion, two hundred sixty-three million, six hundred six thousand, two hundred fifty-six".