125243442251 has 2 divisors, whose sum is σ = 125243442252. Its totient is φ = 125243442250.

The previous prime is 125243442227. The next prime is 125243442293. The reversal of 125243442251 is 152244342521.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 125243442251 - 2⁶ = 125243442187 is a prime.

It is not a weakly prime, because it can be changed into another prime (125243441251) 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, 62621721125 + 62621721126.

It is an arithmetic number, because the mean of its divisors is an integer number (62621721126).

Almost surely, 2^125243442251 is an apocalyptic number.

125243442251 is a deficient number, since it is larger than the sum of its proper divisors (1).

125243442251 is an equidigital number, since it uses as much as digits as its factorization.

125243442251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 76800, while the sum is 35.

Adding to 125243442251 its reverse (152244342521), we get a palindrome (277487784772).

The spelling of 125243442251 in words is "one hundred twenty-five billion, two hundred forty-three million, four hundred forty-two thousand, two hundred fifty-one".