1287402307272 has 128 divisors (see below), whose sum is σ = 3616999200000. Its totient is φ = 424255822848.

The previous prime is 1287402307267. The next prime is 1287402307333. The reversal of 1287402307272 is 2727032047821.

1287402307272 is a `hidden beast` number, since 1 + 2 + 8 + 74 + 0 + 2 + 307 + 272 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6653104 + ... + 6843872.

It is an arithmetic number, because the mean of its divisors is an integer number (28257806250).

Almost surely, 2^{1287402307272} is an apocalyptic number.

1287402307272 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 1287402307272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1808499600000).

1287402307272 is an abundant number, since it is smaller than the sum of its proper divisors (2329596892728).

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

1287402307272 is a wasteful number, since it uses less digits than its factorization.

1287402307272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191140 (or 191130 counting only the distinct ones).

The product of its (nonzero) digits is 526848, while the sum is 45.

The spelling of 1287402307272 in words is "one trillion, two hundred eighty-seven billion, four hundred two million, three hundred seven thousand, two hundred seventy-two".