1281449431003 has 16 divisors (see below), whose sum is σ = 1492360459200. Its totient is φ = 1077506067456.

The previous prime is 1281449431001. The next prime is 1281449431021. The reversal of 1281449431003 is 3001349441821.

It is not a de Polignac number, because 1281449431003 - 2¹ = 1281449431001 is a prime.

It is a super-2 number, since 2×1281449431003² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1281449431001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2373423 + ... + 2862871.

It is an arithmetic number, because the mean of its divisors is an integer number (93272528700).

Almost surely, 2^{1281449431003} is an apocalyptic number.

1281449431003 is a deficient number, since it is larger than the sum of its proper divisors (210911028197).

1281449431003 is an equidigital number, since it uses as much as digits as its factorization.

1281449431003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496566.

The product of its (nonzero) digits is 82944, while the sum is 40.

The spelling of 1281449431003 in words is "one trillion, two hundred eighty-one billion, four hundred forty-nine million, four hundred thirty-one thousand, three".