1263031320 has 128 divisors (see below), whose sum is σ = 4051607040. Its totient is φ = 313866240.

The previous prime is 1263031313. The next prime is 1263031331. The reversal of 1263031320 is 231303621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 207115 + ... + 213125.

It is an arithmetic number, because the mean of its divisors is an integer number (31653180).

Almost surely, 2^1263031320 is an apocalyptic number.

1263031320 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 1263031320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2025803520).

1263031320 is an abundant number, since it is smaller than the sum of its proper divisors (2788575720).

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

1263031320 is a wasteful number, since it uses less digits than its factorization.

1263031320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6145 (or 6141 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 1263031320 is about 35539.1519313559. The cubic root of 1263031320 is about 1080.9477620055.

Adding to 1263031320 its reverse (231303621), we get a palindrome (1494334941).

The spelling of 1263031320 in words is "one billion, two hundred sixty-three million, thirty-one thousand, three hundred twenty".