1291401289000 has 64 divisors (see below), whose sum is σ = 3023104790160. Its totient is φ = 516350982400.

The previous prime is 1291401288973. The next prime is 1291401289063. The reversal of 1291401289000 is 9821041921.

It can be written as a sum of positive squares in 8 ways, for example, as 54381307204 + 1237019981796 = 233198^2 + 1112214^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2216322 + ... + 2737678.

Almost surely, 2^{1291401289000} is an apocalyptic number.

1291401289000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1291401289000 is an abundant number, since it is smaller than the sum of its proper divisors (1731703501160).

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

1291401289000 is a wasteful number, since it uses less digits than its factorization.

1291401289000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 523855 (or 523841 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 37.

The spelling of 1291401289000 in words is "one trillion, two hundred ninety-one billion, four hundred one million, two hundred eighty-nine thousand".