125421611245 has 16 divisors (see below), whose sum is σ = 172018470528. Its totient is φ = 85997545920.

The previous prime is 125421611191. The next prime is 125421611261. The reversal of 125421611245 is 542116124521.

It is not a de Polignac number, because 125421611245 - 2¹¹ = 125421609197 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 125421611245.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 436687 + ... + 664483.

It is an arithmetic number, because the mean of its divisors is an integer number (10751154408).

Almost surely, 2^125421611245 is an apocalyptic number.

It is an amenable number.

125421611245 is a deficient number, since it is larger than the sum of its proper divisors (46596859283).

125421611245 is a wasteful number, since it uses less digits than its factorization.

125421611245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243540.

The product of its digits is 19200, while the sum is 34.

Adding to 125421611245 its reverse (542116124521), we get a palindrome (667537735766).

The spelling of 125421611245 in words is "one hundred twenty-five billion, four hundred twenty-one million, six hundred eleven thousand, two hundred forty-five".