125744721041 has 2 divisors, whose sum is σ = 125744721042. Its totient is φ = 125744721040.

The previous prime is 125744721029. The next prime is 125744721061. The reversal of 125744721041 is 140127447521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85846656016 + 39898065025 = 292996^2 + 199745^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125744721041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 125744720986 and 125744721004.

It is not a weakly prime, because it can be changed into another prime (125744721061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62872360520 + 62872360521.

It is an arithmetic number, because the mean of its divisors is an integer number (62872360521).

Almost surely, 2^125744721041 is an apocalyptic number.

It is an amenable number.

125744721041 is a deficient number, since it is larger than the sum of its proper divisors (1).

125744721041 is an equidigital number, since it uses as much as digits as its factorization.

125744721041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62720, while the sum is 38.

The spelling of 125744721041 in words is "one hundred twenty-five billion, seven hundred forty-four million, seven hundred twenty-one thousand, forty-one".