1263504255 has 16 divisors (see below), whose sum is σ = 2177115360. Its totient is φ = 622032768.

The previous prime is 1263504251. The next prime is 1263504299. The reversal of 1263504255 is 5524053621.

It is not a de Polignac number, because 1263504255 - 2² = 1263504251 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263504251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3239560 + ... + 3239949.

It is an arithmetic number, because the mean of its divisors is an integer number (136069710).

Almost surely, 2^1263504255 is an apocalyptic number.

1263504255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1263504255 is a deficient number, since it is larger than the sum of its proper divisors (913611105).

1263504255 is a wasteful number, since it uses less digits than its factorization.

1263504255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6479530.

The product of its (nonzero) digits is 36000, while the sum is 33.

The square root of 1263504255 is about 35545.8050267539. The cubic root of 1263504255 is about 1081.0826634465.

Adding to 1263504255 its reverse (5524053621), we get a palindrome (6787557876).

The spelling of 1263504255 in words is "one billion, two hundred sixty-three million, five hundred four thousand, two hundred fifty-five".