125544524321 has 2 divisors, whose sum is σ = 125544524322. Its totient is φ = 125544524320.

The previous prime is 125544524309. The next prime is 125544524351. The reversal of 125544524321 is 123425445521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 125131987600 + 412536721 = 353740^2 + 20311^2 .

It is a cyclic number.

It is not a de Polignac number, because 125544524321 - 2¹⁴ = 125544507937 is a prime.

It is a super-2 number, since 2×125544524321² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (125544524351) by changing a digit.

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, 62772262160 + 62772262161.

It is an arithmetic number, because the mean of its divisors is an integer number (62772262161).

Almost surely, 2^125544524321 is an apocalyptic number.

It is an amenable number.

125544524321 is a deficient number, since it is larger than the sum of its proper divisors (1).

125544524321 is an equidigital number, since it uses as much as digits as its factorization.

125544524321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 192000, while the sum is 38.

Adding to 125544524321 its reverse (123425445521), we get a palindrome (248969969842).

The spelling of 125544524321 in words is "one hundred twenty-five billion, five hundred forty-four million, five hundred twenty-four thousand, three hundred twenty-one".