1243422531125 has 8 divisors (see below), whose sum is σ = 1551791319000. Its totient is φ = 994738024800.

The previous prime is 1243422531089. The next prime is 1243422531179. The reversal of 1243422531125 is 5211352243421.

It can be written as a sum of positive squares in 4 ways, for example, as 24443133649 + 1218979397476 = 156343^2 + 1104074^2 .

It is not a de Polignac number, because 1243422531125 - 2²⁶ = 1243355422261 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4973690000 + ... + 4973690249.

It is an arithmetic number, because the mean of its divisors is an integer number (193973914875).

Almost surely, 2^{1243422531125} is an apocalyptic number.

It is an amenable number.

1243422531125 is a deficient number, since it is larger than the sum of its proper divisors (308368787875).

1243422531125 is an frugal number, since it uses more digits than its factorization.

1243422531125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9947380264 (or 9947380254 counting only the distinct ones).

The product of its digits is 57600, while the sum is 35.

Adding to 1243422531125 its reverse (5211352243421), we get a palindrome (6454774774546).

The spelling of 1243422531125 in words is "one trillion, two hundred forty-three billion, four hundred twenty-two million, five hundred thirty-one thousand, one hundred twenty-five".