1261782884 has 12 divisors (see below), whose sum is σ = 2259471984. Its totient is φ = 616219464.

The previous prime is 1261782883. The next prime is 1261782911. The reversal of 1261782884 is 4882871621.

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1261782883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3667802 + ... + 3668145.

It is an arithmetic number, because the mean of its divisors is an integer number (188289332).

Almost surely, 2^1261782884 is an apocalyptic number.

It is an amenable number.

1261782884 is a deficient number, since it is larger than the sum of its proper divisors (997689100).

1261782884 is a wasteful number, since it uses less digits than its factorization.

1261782884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7335994 (or 7335992 counting only the distinct ones).

The product of its digits is 344064, while the sum is 47.

The square root of 1261782884 is about 35521.5833543495. The cubic root of 1261782884 is about 1080.5914924086.

The spelling of 1261782884 in words is "one billion, two hundred sixty-one million, seven hundred eighty-two thousand, eight hundred eighty-four".