1263881950 has 12 divisors (see below), whose sum is σ = 2350820520. Its totient is φ = 505552760.

The previous prime is 1263881933. The next prime is 1263881959. The reversal of 1263881950 is 591883621.

It is a junction number, because it is equal to n+sod(n) for n = 1263881897 and 1263881906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263881959) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12638770 + ... + 12638869.

It is an arithmetic number, because the mean of its divisors is an integer number (195901710).

Almost surely, 2^1263881950 is an apocalyptic number.

1263881950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1263881950 is a deficient number, since it is larger than the sum of its proper divisors (1086938570).

1263881950 is a wasteful number, since it uses less digits than its factorization.

1263881950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25277651 (or 25277646 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 43.

The square root of 1263881950 is about 35551.1174226634. The cubic root of 1263881950 is about 1081.1903741608.

The spelling of 1263881950 in words is "one billion, two hundred sixty-three million, eight hundred eighty-one thousand, nine hundred fifty".