1299807488281 has 3 divisors (see below), whose sum is σ = 1299808628373. Its totient is φ = 1299806348190.

The previous prime is 1299807488269. The next prime is 1299807488297. The reversal of 1299807488281 is 1828847089921.

The square root of 1299807488281 is 1140091.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 1299807488281 - 2⁵ = 1299807488249 is a prime.

It is a super-2 number, since 2×1299807488281² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1299807485281) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 570046 + ... + 1710136.

It is an arithmetic number, because the mean of its divisors is an integer number (433269542791).

Almost surely, 2^{1299807488281} is an apocalyptic number.

1299807488281 is the 1140091-st square number.

1299807488281 is the 570046-th centered octagonal number.

It is an amenable number.

1299807488281 is a deficient number, since it is larger than the sum of its proper divisors (1140092).

1299807488281 is an frugal number, since it uses more digits than its factorization.

1299807488281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2280182 (or 1140091 counting only the distinct ones).

The product of its (nonzero) digits is 37158912, while the sum is 67.

The spelling of 1299807488281 in words is "one trillion, two hundred ninety-nine billion, eight hundred seven million, four hundred eighty-eight thousand, two hundred eighty-one".