1281434425560 has 128 divisors (see below), whose sum is σ = 4313740017600. Its totient is φ = 338332492800.

The previous prime is 1281434425547. The next prime is 1281434425571. The reversal of 1281434425560 is 655244341821.

1281434425560 is a `hidden beast` number, since 1 + 2 + 8 + 1 + 43 + 4 + 42 + 5 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

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, 5764749 + ... + 5982908.

Almost surely, 2^{1281434425560} is an apocalyptic number.

1281434425560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1281434425560 is an abundant number, since it is smaller than the sum of its proper divisors (3032305592040).

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

1281434425560 is a wasteful number, since it uses less digits than its factorization.

1281434425560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11747778 (or 11747768 counting only the distinct ones).

The product of its (nonzero) digits is 921600, while the sum is 45.

The spelling of 1281434425560 in words is "one trillion, two hundred eighty-one billion, four hundred thirty-four million, four hundred twenty-five thousand, five hundred sixty".