125401185047 has 4 divisors (see below), whose sum is σ = 128317491720. Its totient is φ = 122484878376.

The previous prime is 125401185023. The next prime is 125401185071. The reversal of 125401185047 is 740581104521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 740581104521 = 92723 ⋅7987027.

It is an interprime number because it is at equal distance from previous prime (125401185023) and next prime (125401185071).

It is a cyclic number.

It is not a de Polignac number, because 125401185047 - 2⁸ = 125401184791 is a prime.

It is a super-2 number, since 2×125401185047² (a number of 23 digits) contains 22 as substring.

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 125401185047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125401185017) 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, 1458153272 + ... + 1458153357.

It is an arithmetic number, because the mean of its divisors is an integer number (32079372930).

Almost surely, 2^125401185047 is an apocalyptic number.

125401185047 is a deficient number, since it is larger than the sum of its proper divisors (2916306673).

125401185047 is an equidigital number, since it uses as much as digits as its factorization.

125401185047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2916306672.

The product of its (nonzero) digits is 44800, while the sum is 38.

Adding to 125401185047 its reverse (740581104521), we get a palindrome (865982289568).

The spelling of 125401185047 in words is "one hundred twenty-five billion, four hundred one million, one hundred eighty-five thousand, forty-seven".