25872019 has 2 divisors, whose sum is σ = 25872020. Its totient is φ = 25872018.

The previous prime is 25871999. The next prime is 25872029. The reversal of 25872019 is 91027852.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25872019 - 2¹⁵ = 25839251 is a prime.

It is a super-2 number, since 2×25872019² = 1338722734272722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25872029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12936009 + 12936010.

It is an arithmetic number, because the mean of its divisors is an integer number (12936010).

Almost surely, 2^25872019 is an apocalyptic number.

25872019 is a deficient number, since it is larger than the sum of its proper divisors (1).

25872019 is an equidigital number, since it uses as much as digits as its factorization.

25872019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 25872019 is about 5086.4544625898. The cubic root of 25872019 is about 295.7627260619.

It can be divided in two parts, 258720 and 19, that multiplied together give a triangular number (4915680 = T₃₁₃₅).

The spelling of 25872019 in words is "twenty-five million, eight hundred seventy-two thousand, nineteen".