128597267 has 2 divisors, whose sum is σ = 128597268. Its totient is φ = 128597266.

The previous prime is 128597243. The next prime is 128597297. The reversal of 128597267 is 762795821.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (762795821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 128597267 - 2²² = 124402963 is a prime.

It is not a weakly prime, because it can be changed into another prime (128597297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64298633 + 64298634.

It is an arithmetic number, because the mean of its divisors is an integer number (64298634).

Almost surely, 2^128597267 is an apocalyptic number.

128597267 is a deficient number, since it is larger than the sum of its proper divisors (1).

128597267 is an equidigital number, since it uses as much as digits as its factorization.

128597267 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 423360, while the sum is 47.

The square root of 128597267 is about 11340.0735006436. The cubic root of 128597267 is about 504.7510677188.

The spelling of 128597267 in words is "one hundred twenty-eight million, five hundred ninety-seven thousand, two hundred sixty-seven".