1261482320872 has 32 divisors (see below), whose sum is σ = 2443849678080. Its totient is φ = 610124307520.

The previous prime is 1261482320863. The next prime is 1261482320873. The reversal of 1261482320872 is 2780232841621.

It is not an unprimeable number, because it can be changed into a prime (1261482320873) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20921968 + ... + 20982175.

It is an arithmetic number, because the mean of its divisors is an integer number (76370302440).

Almost surely, 2^{1261482320872} is an apocalyptic number.

It is an amenable number.

1261482320872 is a deficient number, since it is larger than the sum of its proper divisors (1182367357208).

1261482320872 is a wasteful number, since it uses less digits than its factorization.

1261482320872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41904273 (or 41904269 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 46.

The spelling of 1261482320872 in words is "one trillion, two hundred sixty-one billion, four hundred eighty-two million, three hundred twenty thousand, eight hundred seventy-two".