1281449431002 has 32 divisors (see below), whose sum is σ = 2761161415488. Its totient is φ = 394132634496.

The previous prime is 1281449431001. The next prime is 1281449431021. The reversal of 1281449431002 is 2001349441821.

It is a super-2 number, since 2×1281449431002² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

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

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3128748 + ... + 3514535.

It is an arithmetic number, because the mean of its divisors is an integer number (86286294234).

Almost surely, 2^{1281449431002} is an apocalyptic number.

1281449431002 is an abundant number, since it is smaller than the sum of its proper divisors (1479711984486).

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

1281449431002 is a wasteful number, since it uses less digits than its factorization.

1281449431002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6645774.

The product of its (nonzero) digits is 55296, while the sum is 39.

The spelling of 1281449431002 in words is "one trillion, two hundred eighty-one billion, four hundred forty-nine million, four hundred thirty-one thousand, two".