1263271123400 has 192 divisors, whose sum is σ = 3561897024000. Its totient is φ = 410356224000.

The previous prime is 1263271123339. The next prime is 1263271123441. The reversal of 1263271123400 is 43211723621.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 174176 + ... + 1599024.

It is an arithmetic number, because the mean of its divisors is an integer number (18551547000).

Almost surely, 2^{1263271123400} is an apocalyptic number.

1263271123400 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 1263271123400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1780948512000).

1263271123400 is an abundant number, since it is smaller than the sum of its proper divisors (2298625900600).

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

1263271123400 is a wasteful number, since it uses less digits than its factorization.

1263271123400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1424920 (or 1424911 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 32.

The spelling of 1263271123400 in words is "one trillion, two hundred sixty-three billion, two hundred seventy-one million, one hundred twenty-three thousand, four hundred".