1263324240 has 60 divisors (see below), whose sum is σ = 4242666324. Its totient is φ = 336886272.

The previous prime is 1263324239. The next prime is 1263324241. The reversal of 1263324240 is 424233621.

1263324240 is a `hidden beast` number, since 1 + 2 + 633 + 2 + 4 + 24 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1263324239) and next prime (1263324241).

It can be written as a sum of positive squares in 2 ways, for example, as 258180624 + 1005143616 = 16068^2 + 31704^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263324241) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 876589 + ... + 878028.

Almost surely, 2^1263324240 is an apocalyptic number.

1263324240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1263324240 is an abundant number, since it is smaller than the sum of its proper divisors (2979342084).

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

1263324240 is a wasteful number, since it uses less digits than its factorization.

1263324240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1754636 (or 1754627 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 27.

The square root of 1263324240 is about 35543.2727812170. The cubic root of 1263324240 is about 1081.0313193802.

Adding to 1263324240 its reverse (424233621), we get a palindrome (1687557861).

The spelling of 1263324240 in words is "one billion, two hundred sixty-three million, three hundred twenty-four thousand, two hundred forty".