1243450135225 has 24 divisors (see below), whose sum is σ = 1549136960000. Its totient is φ = 990079009920.

The previous prime is 1243450135219. The next prime is 1243450135237. The reversal of 1243450135225 is 5225310543421.

It is a happy number.

It is not a de Polignac number, because 1243450135225 - 2⁷ = 1243450135097 is a prime.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 27847117 + ... + 27891733.

Almost surely, 2^{1243450135225} is an apocalyptic number.

It is an amenable number.

1243450135225 is a deficient number, since it is larger than the sum of its proper divisors (305686824775).

1243450135225 is a wasteful number, since it uses less digits than its factorization.

1243450135225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49849 (or 49844 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

Adding to 1243450135225 its reverse (5225310543421), we get a palindrome (6468760678646).

The spelling of 1243450135225 in words is "one trillion, two hundred forty-three billion, four hundred fifty million, one hundred thirty-five thousand, two hundred twenty-five".