1281406456 has 96 divisors (see below), whose sum is σ = 2744960400. Its totient is φ = 559961600.

The previous prime is 1281406447. The next prime is 1281406471. The reversal of 1281406456 is 6546041821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3293910 + ... + 3294298.

Almost surely, 2^1281406456 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 1281406456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1372480200).

1281406456 is an abundant number, since it is smaller than the sum of its proper divisors (1463553944).

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

1281406456 is a wasteful number, since it uses less digits than its factorization.

1281406456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541 (or 526 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 1281406456 is about 35796.7380636840. The cubic root of 1281406456 is about 1086.1645790864.

The spelling of 1281406456 in words is "one billion, two hundred eighty-one million, four hundred six thousand, four hundred fifty-six".