1298642272812 has 144 divisors (see below), whose sum is σ = 3523015641600. Its totient is φ = 417791545920.

The previous prime is 1298642272687. The next prime is 1298642272813. The reversal of 1298642272812 is 2182722468921.

1298642272812 is a `hidden beast` number, since 1 + 298 + 6 + 4 + 2 + 272 + 81 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1298642272813) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 87910987 + ... + 87925757.

It is an arithmetic number, because the mean of its divisors is an integer number (24465386400).

Almost surely, 2^{1298642272812} is an apocalyptic number.

1298642272812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1298642272812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1761507820800).

1298642272812 is an abundant number, since it is smaller than the sum of its proper divisors (2224373368788).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1298642272812 is a wasteful number, since it uses less digits than its factorization.

1298642272812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17938 (or 17924 counting only the distinct ones).

The product of its digits is 3096576, while the sum is 54.

The spelling of 1298642272812 in words is "one trillion, two hundred ninety-eight billion, six hundred forty-two million, two hundred seventy-two thousand, eight hundred twelve".