1263152881 has 8 divisors (see below), whose sum is σ = 1282848840. Its totient is φ = 1243579392.

The previous prime is 1263152873. The next prime is 1263152899. The reversal of 1263152881 is 1882513621.

It can be written as a sum of positive squares in 4 ways, for example, as 117939600 + 1145213281 = 10860^2 + 33841^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1263152881 - 2³ = 1263152873 is a prime.

It is a super-2 number, since 2×1263152881² = 3191110401557200322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1263152881.

It is not an unprimeable number, because it can be changed into a prime (1263152831) 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, 9720 + ... + 51193.

It is an arithmetic number, because the mean of its divisors is an integer number (160356105).

Almost surely, 2^1263152881 is an apocalyptic number.

It is an amenable number.

1263152881 is a deficient number, since it is larger than the sum of its proper divisors (19695959).

1263152881 is an equidigital number, since it uses as much as digits as its factorization.

1263152881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61235.

The product of its digits is 23040, while the sum is 37.

The square root of 1263152881 is about 35540.8621307925. The cubic root of 1263152881 is about 1080.9824396558.

The spelling of 1263152881 in words is "one billion, two hundred sixty-three million, one hundred fifty-two thousand, eight hundred eighty-one".