123432125042 has 4 divisors (see below), whose sum is σ = 185148187566. Its totient is φ = 61716062520.

The previous prime is 123432125039. The next prime is 123432125051. The reversal of 123432125042 is 240521234321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 103910167201 + 19521957841 = 322351^2 + 139721^2 .

It is a super-4 number, since 4×123432125042⁴ (a number of 45 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 123432124996 and 123432125014.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30858031259 + ... + 30858031262.

Almost surely, 2^123432125042 is an apocalyptic number.

123432125042 is a deficient number, since it is larger than the sum of its proper divisors (61716062524).

123432125042 is an equidigital number, since it uses as much as digits as its factorization.

123432125042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61716062523.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 123432125042 its reverse (240521234321), we get a palindrome (363953359363).

The spelling of 123432125042 in words is "one hundred twenty-three billion, four hundred thirty-two million, one hundred twenty-five thousand, forty-two".