25290019 has 2 divisors, whose sum is σ = 25290020. Its totient is φ = 25290018.

The previous prime is 25289993. The next prime is 25290043. The reversal of 25290019 is 91009252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25290019 - 2⁹ = 25289507 is a prime.

It is a super-2 number, since 2×25290019² = 1279170122040722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25290319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12645009 + 12645010.

It is an arithmetic number, because the mean of its divisors is an integer number (12645010).

Almost surely, 2^25290019 is an apocalyptic number.

25290019 is a deficient number, since it is larger than the sum of its proper divisors (1).

25290019 is an equidigital number, since it uses as much as digits as its factorization.

25290019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 25290019 is about 5028.9182733467. The cubic root of 25290019 is about 293.5281237471.

The spelling of 25290019 in words is "twenty-five million, two hundred ninety thousand, nineteen".