1291800242532 has 12 divisors (see below), whose sum is σ = 3014200565936. Its totient is φ = 430600080840.

The previous prime is 1291800242501. The next prime is 1291800242533. The reversal of 1291800242532 is 2352420081921.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1291800242533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53825010094 + ... + 53825010117.

Almost surely, 2^{1291800242532} is an apocalyptic number.

1291800242532 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1291800242532 is an abundant number, since it is smaller than the sum of its proper divisors (1722400323404).

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

1291800242532 is a wasteful number, since it uses less digits than its factorization.

1291800242532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107650020218 (or 107650020216 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 39.

The spelling of 1291800242532 in words is "one trillion, two hundred ninety-one billion, eight hundred million, two hundred forty-two thousand, five hundred thirty-two".