125312251 has 2 divisors, whose sum is σ = 125312252. Its totient is φ = 125312250.

The previous prime is 125312227. The next prime is 125312309. The reversal of 125312251 is 152213521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125312251 - 2⁷ = 125312123 is a prime.

It is not a weakly prime, because it can be changed into another prime (125319251) 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 as a sum of consecutive naturals, namely, 62656125 + 62656126.

It is an arithmetic number, because the mean of its divisors is an integer number (62656126).

Almost surely, 2^125312251 is an apocalyptic number.

125312251 is a deficient number, since it is larger than the sum of its proper divisors (1).

125312251 is an equidigital number, since it uses as much as digits as its factorization.

125312251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 600, while the sum is 22.

The square root of 125312251 is about 11194.2954668885. The cubic root of 125312251 is about 500.4159884779.

Adding to 125312251 its reverse (152213521), we get a palindrome (277525772).

The spelling of 125312251 in words is "one hundred twenty-five million, three hundred twelve thousand, two hundred fifty-one".