1263251442 has 16 divisors (see below), whose sum is σ = 2659476960. Its totient is φ = 398921472.

The previous prime is 1263251441. The next prime is 1263251443. The reversal of 1263251442 is 2441523621.

It is an interprime number because it is at equal distance from previous prime (1263251441) and next prime (1263251443).

It is not an unprimeable number, because it can be changed into a prime (1263251441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5540463 + ... + 5540690.

It is an arithmetic number, because the mean of its divisors is an integer number (166217310).

Almost surely, 2^1263251442 is an apocalyptic number.

1263251442 is an abundant number, since it is smaller than the sum of its proper divisors (1396225518).

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

1263251442 is a wasteful number, since it uses less digits than its factorization.

1263251442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11081177.

The product of its digits is 11520, while the sum is 30.

The square root of 1263251442 is about 35542.2486908186. The cubic root of 1263251442 is about 1081.0105544736.

The spelling of 1263251442 in words is "one billion, two hundred sixty-three million, two hundred fifty-one thousand, four hundred forty-two".