125560474401521 has 4 divisors (see below), whose sum is σ = 132946384660452. Its totient is φ = 118174564142592.

The previous prime is 125560474401503. The next prime is 125560474401529. The reversal of 125560474401521 is 125104474065521.

It is a happy number.

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 100076514630625 + 25483959770896 = 10003825^2 + 5048164^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125560474401521 is a prime.

It is a super-2 number, since 2×125560474401521² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (125560474401529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3692955129440 + ... + 3692955129473.

It is an arithmetic number, because the mean of its divisors is an integer number (33236596165113).

Almost surely, 2^{125560474401521} is an apocalyptic number.

It is an amenable number.

125560474401521 is a deficient number, since it is larger than the sum of its proper divisors (7385910258931).

125560474401521 is an equidigital number, since it uses as much as digits as its factorization.

125560474401521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7385910258930.

The product of its (nonzero) digits is 1344000, while the sum is 47.

The spelling of 125560474401521 in words is "one hundred twenty-five trillion, five hundred sixty billion, four hundred seventy-four million, four hundred one thousand, five hundred twenty-one".