126325021 has 2 divisors, whose sum is σ = 126325022. Its totient is φ = 126325020.

The previous prime is 126324997. The next prime is 126325033. The reversal of 126325021 is 120523621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116402521 + 9922500 = 10789^2 + 3150^2 .

It is a cyclic number.

It is not a de Polignac number, because 126325021 - 2²⁵ = 92770589 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 126324983 and 126325001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (126325051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63162510 + 63162511.

It is an arithmetic number, because the mean of its divisors is an integer number (63162511).

Almost surely, 2^126325021 is an apocalyptic number.

It is an amenable number.

126325021 is a deficient number, since it is larger than the sum of its proper divisors (1).

126325021 is an equidigital number, since it uses as much as digits as its factorization.

126325021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 126325021 is about 11239.4404220139. The cubic root of 126325021 is about 501.7604887503.

Adding to 126325021 its reverse (120523621), we get a palindrome (246848642).

The spelling of 126325021 in words is "one hundred twenty-six million, three hundred twenty-five thousand, twenty-one".