125756251 has 2 divisors, whose sum is σ = 125756252. Its totient is φ = 125756250.

The previous prime is 125756237. The next prime is 125756263. The reversal of 125756251 is 152657521.

It is a strong prime.

It is an emirp because it is prime and its reverse (152657521) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 125756251 - 2¹¹ = 125754203 is a prime.

It is not a weakly prime, because it can be changed into another prime (125756221) 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 as a sum of consecutive naturals, namely, 62878125 + 62878126.

It is an arithmetic number, because the mean of its divisors is an integer number (62878126).

Almost surely, 2^125756251 is an apocalyptic number.

125756251 is a deficient number, since it is larger than the sum of its proper divisors (1).

125756251 is an equidigital number, since it uses as much as digits as its factorization.

125756251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21000, while the sum is 34.

The square root of 125756251 is about 11214.1094608533. The cubic root of 125756251 is about 501.0063079964.

The spelling of 125756251 in words is "one hundred twenty-five million, seven hundred fifty-six thousand, two hundred fifty-one".