1261303868 has 24 divisors (see below), whose sum is σ = 2408963760. Its totient is φ = 573077120.

The previous prime is 1261303867. The next prime is 1261303903. The reversal of 1261303868 is 8683031621.

It is a super-2 number, since 2×1261303868² = 3181774894863522848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261303867) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 136730 + ... + 145662.

It is an arithmetic number, because the mean of its divisors is an integer number (100373490).

Almost surely, 2^1261303868 is an apocalyptic number.

It is an amenable number.

1261303868 is a deficient number, since it is larger than the sum of its proper divisors (1147659892).

1261303868 is a wasteful number, since it uses less digits than its factorization.

1261303868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12157 (or 12155 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 1261303868 is about 35514.8401094528. The cubic root of 1261303868 is about 1080.4547319202.

The spelling of 1261303868 in words is "one billion, two hundred sixty-one million, three hundred three thousand, eight hundred sixty-eight".