1263011260 has 144 divisors (see below), whose sum is σ = 3338423424. Its totient is φ = 398641152.

The previous prime is 1263011251. The next prime is 1263011327. The reversal of 1263011260 is 621103621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 782214 + ... + 783826.

It is an arithmetic number, because the mean of its divisors is an integer number (23183496).

Almost surely, 2^1263011260 is an apocalyptic number.

1263011260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1263011260, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1669211712).

1263011260 is an abundant number, since it is smaller than the sum of its proper divisors (2075412164).

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

1263011260 is a wasteful number, since it uses less digits than its factorization.

1263011260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700 (or 1691 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1263011260 is about 35538.8697062808. The cubic root of 1263011260 is about 1080.9420392846.

Adding to 1263011260 its reverse (621103621), we get a palindrome (1884114881).

The spelling of 1263011260 in words is "one billion, two hundred sixty-three million, eleven thousand, two hundred sixty".