125141021 has 2 divisors, whose sum is σ = 125141022. Its totient is φ = 125141020.

The previous prime is 125140997. The next prime is 125141033. The reversal of 125141021 is 120141521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 114811225 + 10329796 = 10715^2 + 3214^2 .

It is a cyclic number.

It is not a de Polignac number, because 125141021 - 2⁶ = 125140957 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125140021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62570510 + 62570511.

It is an arithmetic number, because the mean of its divisors is an integer number (62570511).

Almost surely, 2^125141021 is an apocalyptic number.

It is an amenable number.

125141021 is a deficient number, since it is larger than the sum of its proper divisors (1).

125141021 is an equidigital number, since it uses as much as digits as its factorization.

125141021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 125141021 is about 11186.6447606063. The cubic root of 125141021 is about 500.1879573352.

Adding to 125141021 its reverse (120141521), we get a palindrome (245282542).

The spelling of 125141021 in words is "one hundred twenty-five million, one hundred forty-one thousand, twenty-one".