128253767 has 4 divisors (see below), whose sum is σ = 128829120. Its totient is φ = 127678416.

The previous prime is 128253751. The next prime is 128253793. The reversal of 128253767 is 767352821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128253767 - 2⁴ = 128253751 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128253467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 287342 + ... + 287787.

It is an arithmetic number, because the mean of its divisors is an integer number (32207280).

Almost surely, 2^128253767 is an apocalyptic number.

128253767 is a deficient number, since it is larger than the sum of its proper divisors (575353).

128253767 is an equidigital number, since it uses as much as digits as its factorization.

128253767 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575352.

The product of its digits is 141120, while the sum is 41.

The square root of 128253767 is about 11324.9179687978. The cubic root of 128253767 is about 504.3012484223.

The spelling of 128253767 in words is "one hundred twenty-eight million, two hundred fifty-three thousand, seven hundred sixty-seven".