1125721725647 has 2 divisors, whose sum is σ = 1125721725648. Its totient is φ = 1125721725646.

The previous prime is 1125721725613. The next prime is 1125721725679. The reversal of 1125721725647 is 7465271275211.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1125721725647 - 2¹⁰ = 1125721724623 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1125721725595 and 1125721725604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1125721725607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562860862823 + 562860862824.

It is an arithmetic number, because the mean of its divisors is an integer number (562860862824).

Almost surely, 2^{1125721725647} is an apocalyptic number.

1125721725647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125721725647 is an equidigital number, since it uses as much as digits as its factorization.

1125721725647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1646400, while the sum is 50.

The spelling of 1125721725647 in words is "one trillion, one hundred twenty-five billion, seven hundred twenty-one million, seven hundred twenty-five thousand, six hundred forty-seven".