1281982463 has 8 divisors (see below), whose sum is σ = 1335480960. Its totient is φ = 1229243040.

The previous prime is 1281982451. The next prime is 1281982483. The reversal of 1281982463 is 3642891821.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1281982463 - 2⁴ = 1281982447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1281982423) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186320 + ... + 193077.

It is an arithmetic number, because the mean of its divisors is an integer number (166935120).

Almost surely, 2^1281982463 is an apocalyptic number.

1281982463 is a deficient number, since it is larger than the sum of its proper divisors (53498497).

1281982463 is a wasteful number, since it uses less digits than its factorization.

1281982463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379537.

The product of its digits is 165888, while the sum is 44.

The square root of 1281982463 is about 35804.7826833232. The cubic root of 1281982463 is about 1086.3273025473.

The spelling of 1281982463 in words is "one billion, two hundred eighty-one million, nine hundred eighty-two thousand, four hundred sixty-three".