125711257 has 8 divisors (see below), whose sum is σ = 144942336. Its totient is φ = 106798272.

The previous prime is 125711249. The next prime is 125711279. The reversal of 125711257 is 752117521.

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

It is not a de Polignac number, because 125711257 - 2³ = 125711249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (125711227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 78673 + ... + 80254.

It is an arithmetic number, because the mean of its divisors is an integer number (18117792).

Almost surely, 2^125711257 is an apocalyptic number.

It is an amenable number.

125711257 is a deficient number, since it is larger than the sum of its proper divisors (19231079).

125711257 is a wasteful number, since it uses less digits than its factorization.

125711257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159047.

The product of its digits is 4900, while the sum is 31.

The square root of 125711257 is about 11212.1031479379. The cubic root of 125711257 is about 500.9465496235.

Adding to 125711257 its reverse (752117521), we get a palindrome (877828778).

The spelling of 125711257 in words is "one hundred twenty-five million, seven hundred eleven thousand, two hundred fifty-seven".