20125289 has 2 divisors, whose sum is σ = 20125290. Its totient is φ = 20125288.

The previous prime is 20125267. The next prime is 20125307. The reversal of 20125289 is 98252102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17707264 + 2418025 = 4208^2 + 1555^2 .

It is a cyclic number.

It is not a de Polignac number, because 20125289 - 2⁸ = 20125033 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (20125249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10062644 + 10062645.

It is an arithmetic number, because the mean of its divisors is an integer number (10062645).

Almost surely, 2^20125289 is an apocalyptic number.

It is an amenable number.

20125289 is a deficient number, since it is larger than the sum of its proper divisors (1).

20125289 is an equidigital number, since it uses as much as digits as its factorization.

20125289 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 20125289 is about 4486.1218217966. The cubic root of 20125289 is about 272.0073932895.

The spelling of 20125289 in words is "twenty million, one hundred twenty-five thousand, two hundred eighty-nine".