125452021 has 2 divisors, whose sum is σ = 125452022. Its totient is φ = 125452020.

The previous prime is 125452013. The next prime is 125452031. The reversal of 125452021 is 120254521.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 124211025 + 1240996 = 11145^2 + 1114^2 .

It is a cyclic number.

It is not a de Polignac number, because 125452021 - 2³ = 125452013 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 125451983 and 125452001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (125452001) 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, 62726010 + 62726011.

It is an arithmetic number, because the mean of its divisors is an integer number (62726011).

Almost surely, 2^125452021 is an apocalyptic number.

It is an amenable number.

125452021 is a deficient number, since it is larger than the sum of its proper divisors (1).

125452021 is an equidigital number, since it uses as much as digits as its factorization.

125452021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 125452021 is about 11200.5366389294. The cubic root of 125452021 is about 500.6019696409.

The spelling of 125452021 in words is "one hundred twenty-five million, four hundred fifty-two thousand, twenty-one".