25420189 has 2 divisors, whose sum is σ = 25420190. Its totient is φ = 25420188.

The previous prime is 25420177. The next prime is 25420229. The reversal of 25420189 is 98102452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 17994564 + 7425625 = 4242^2 + 2725^2 .

It is a cyclic number.

It is not a de Polignac number, because 25420189 - 2⁹ = 25419677 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25420189.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25420139) 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, 12710094 + 12710095.

It is an arithmetic number, because the mean of its divisors is an integer number (12710095).

Almost surely, 2^25420189 is an apocalyptic number.

It is an amenable number.

25420189 is a deficient number, since it is larger than the sum of its proper divisors (1).

25420189 is an equidigital number, since it uses as much as digits as its factorization.

25420189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 25420189 is about 5041.8438095601. The cubic root of 25420189 is about 294.0308673840.

The spelling of 25420189 in words is "twenty-five million, four hundred twenty thousand, one hundred eighty-nine".