125096821 has 2 divisors, whose sum is σ = 125096822. Its totient is φ = 125096820.

The previous prime is 125096813. The next prime is 125096827. The reversal of 125096821 is 128690521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 97911025 + 27185796 = 9895^2 + 5214^2 .

It is a cyclic number.

It is not a de Polignac number, because 125096821 - 2³ = 125096813 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125096827) 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, 62548410 + 62548411.

It is an arithmetic number, because the mean of its divisors is an integer number (62548411).

Almost surely, 2^125096821 is an apocalyptic number.

It is an amenable number.

125096821 is a deficient number, since it is larger than the sum of its proper divisors (1).

125096821 is an equidigital number, since it uses as much as digits as its factorization.

125096821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 125096821 is about 11184.6690161131. The cubic root of 125096821 is about 500.1290613501.

The spelling of 125096821 in words is "one hundred twenty-five million, ninety-six thousand, eight hundred twenty-one".