1281488842 has 16 divisors (see below), whose sum is σ = 1933142400. Its totient is φ = 637116480.

The previous prime is 1281488837. The next prime is 1281488843. The reversal of 1281488842 is 2488841821.

It is a junction number, because it is equal to n+sod(n) for n = 1281488792 and 1281488801.

It is not an unprimeable number, because it can be changed into a prime (1281488843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409042 + ... + 412162.

It is an arithmetic number, because the mean of its divisors is an integer number (120821400).

Almost surely, 2^1281488842 is an apocalyptic number.

1281488842 is a deficient number, since it is larger than the sum of its proper divisors (651653558).

1281488842 is a wasteful number, since it uses less digits than its factorization.

1281488842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4221.

The product of its digits is 262144, while the sum is 46.

The square root of 1281488842 is about 35797.8887924972. Note that the first 3 decimals coincide. The cubic root of 1281488842 is about 1086.1878563317.

The spelling of 1281488842 in words is "one billion, two hundred eighty-one million, four hundred eighty-eight thousand, eight hundred forty-two".