125402403242161 has 8 divisors (see below), whose sum is σ = 125411001289640. Its totient is φ = 125393805551232.

The previous prime is 125402403242147. The next prime is 125402403242201. The reversal of 125402403242161 is 161242304204521.

It can be written as a sum of positive squares in 4 ways, for example, as 51300331880625 + 74102071361536 = 7162425^2 + 8608256^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125402403242161 - 2⁷ = 125402403242033 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 125402403242161.

It is not an unprimeable number, because it can be changed into a prime (125402403240161) 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 7 ways as a sum of consecutive naturals, for example, 1129807855 + ... + 1129918843.

It is an arithmetic number, because the mean of its divisors is an integer number (15676375161205).

Almost surely, 2^{125402403242161} is an apocalyptic number.

It is an amenable number.

125402403242161 is a deficient number, since it is larger than the sum of its proper divisors (8598047479).

125402403242161 is a wasteful number, since it uses less digits than its factorization.

125402403242161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178275.

The product of its (nonzero) digits is 92160, while the sum is 37.

Adding to 125402403242161 its reverse (161242304204521), we get a palindrome (286644707446682).

The spelling of 125402403242161 in words is "one hundred twenty-five trillion, four hundred two billion, four hundred three million, two hundred forty-two thousand, one hundred sixty-one".