125784211257 has 24 divisors (see below), whose sum is σ = 189262504704. Its totient is φ = 83480068368.

The previous prime is 125784211207. The next prime is 125784211261. The reversal of 125784211257 is 752112487521.

125784211257 is a `hidden beast` number, since 1 + 2 + 578 + 4 + 21 + 1 + 2 + 57 = 666.

It is not a de Polignac number, because 125784211257 - 2⁶ = 125784211193 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125784211207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1106418 + ... + 1214795.

It is an arithmetic number, because the mean of its divisors is an integer number (7885937696).

Almost surely, 2^125784211257 is an apocalyptic number.

It is an amenable number.

125784211257 is a deficient number, since it is larger than the sum of its proper divisors (63478293447).

125784211257 is an equidigital number, since it uses as much as digits as its factorization.

125784211257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2321451 (or 2321439 counting only the distinct ones).

The product of its digits is 313600, while the sum is 45.

Adding to 125784211257 its reverse (752112487521), we get a palindrome (877896698778).

The spelling of 125784211257 in words is "one hundred twenty-five billion, seven hundred eighty-four million, two hundred eleven thousand, two hundred fifty-seven".