125136253145 has 4 divisors (see below), whose sum is σ = 150163503780. Its totient is φ = 100109002512.

The previous prime is 125136253141. The next prime is 125136253171. The reversal of 125136253145 is 541352631521.

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

It can be written as a sum of positive squares in 2 ways, for example, as 58846997056 + 66289256089 = 242584^2 + 257467^2 .

It is a cyclic number.

It is not a de Polignac number, because 125136253145 - 2² = 125136253141 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125136253099 and 125136253108.

It is not an unprimeable number, because it can be changed into a prime (125136253141) 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, 12513625310 + ... + 12513625319.

It is an arithmetic number, because the mean of its divisors is an integer number (37540875945).

Almost surely, 2^125136253145 is an apocalyptic number.

It is an amenable number.

125136253145 is a deficient number, since it is larger than the sum of its proper divisors (25027250635).

125136253145 is an equidigital number, since it uses as much as digits as its factorization.

125136253145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25027250634.

The product of its digits is 108000, while the sum is 38.

Adding to 125136253145 its reverse (541352631521), we get a palindrome (666488884666).

The spelling of 125136253145 in words is "one hundred twenty-five billion, one hundred thirty-six million, two hundred fifty-three thousand, one hundred forty-five".