1281447914004 has 144 divisors (see below), whose sum is σ = 3436921393920. Its totient is φ = 412886073600.

The previous prime is 1281447913961. The next prime is 1281447914069. The reversal of 1281447914004 is 4004197441821.

1281447914004 is a `hidden beast` number, since 1 + 2 + 81 + 447 + 91 + 40 + 0 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 94544092 + ... + 94557644.

It is an arithmetic number, because the mean of its divisors is an integer number (23867509680).

Almost surely, 2^{1281447914004} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1281447914004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1718460696960).

1281447914004 is an abundant number, since it is smaller than the sum of its proper divisors (2155473479916).

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

1281447914004 is a wasteful number, since it uses less digits than its factorization.

1281447914004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14539 (or 14500 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The spelling of 1281447914004 in words is "one trillion, two hundred eighty-one billion, four hundred forty-seven million, nine hundred fourteen thousand, four".