1263900022 has 48 divisors (see below), whose sum is σ = 2429436672. Its totient is φ = 487604880.

The previous prime is 1263899971. The next prime is 1263900059. The reversal of 1263900022 is 2200093621.

It is a happy number.

It is a super-2 number, since 2×1263900022² = 3194886531223200968, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1263900022.

It is a congruent number.

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 23 ways as a sum of consecutive naturals, for example, 105343 + ... + 116725.

It is an arithmetic number, because the mean of its divisors is an integer number (50613264).

Almost surely, 2^1263900022 is an apocalyptic number.

1263900022 is a deficient number, since it is larger than the sum of its proper divisors (1165536650).

1263900022 is a wasteful number, since it uses less digits than its factorization.

1263900022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11513 (or 11506 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 1263900022 is about 35551.3715909808. The cubic root of 1263900022 is about 1081.1955273793.

Adding to 1263900022 its reverse (2200093621), we get a palindrome (3463993643).

The spelling of 1263900022 in words is "one billion, two hundred sixty-three million, nine hundred thousand, twenty-two".