128025019 has 2 divisors, whose sum is σ = 128025020. Its totient is φ = 128025018.

The previous prime is 128025013. The next prime is 128025077. The reversal of 128025019 is 910520821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128025019 - 2²³ = 119636411 is a prime.

It is a super-2 number, since 2×128025019² = 32780810979900722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128025013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64012509 + 64012510.

It is an arithmetic number, because the mean of its divisors is an integer number (64012510).

Almost surely, 2^128025019 is an apocalyptic number.

128025019 is a deficient number, since it is larger than the sum of its proper divisors (1).

128025019 is an equidigital number, since it uses as much as digits as its factorization.

128025019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 128025019 is about 11314.8141389949. The cubic root of 128025019 is about 504.0012531988.

The spelling of 128025019 in words is "one hundred twenty-eight million, twenty-five thousand, nineteen".