1243122342525 has 54 divisors (see below), whose sum is σ = 2590091935002. Its totient is φ = 568284494400.

The previous prime is 1243122342503. The next prime is 1243122342559. The reversal of 1243122342525 is 5252432213421.

1243122342525 is a `hidden beast` number, since 1 + 2 + 4 + 3 + 1 + 223 + 425 + 2 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 65563138809 + 1177559203716 = 256053^2 + 1085154^2 .

It is not a de Polignac number, because 1243122342525 - 2⁵ = 1243122342493 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1243122342525.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 56366406 + ... + 56388455.

It is an arithmetic number, because the mean of its divisors is an integer number (47964665463).

Almost surely, 2^{1243122342525} is an apocalyptic number.

1243122342525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1243122342525 is an abundant number, since it is smaller than the sum of its proper divisors (1346969592477).

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

1243122342525 is a wasteful number, since it uses less digits than its factorization.

1243122342525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112754891 (or 112754876 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

Adding to 1243122342525 its reverse (5252432213421), we get a palindrome (6495554555946).

The spelling of 1243122342525 in words is "one trillion, two hundred forty-three billion, one hundred twenty-two million, three hundred forty-two thousand, five hundred twenty-five".