128469235 has 4 divisors (see below), whose sum is σ = 154163088. Its totient is φ = 102775384.

The previous prime is 128469193. The next prime is 128469287. The reversal of 128469235 is 532964821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 532964821 = 1291 ⋅412831.

It is a cyclic number.

It is not a de Polignac number, because 128469235 - 2⁹ = 128468723 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12846919 + ... + 12846928.

It is an arithmetic number, because the mean of its divisors is an integer number (38540772).

Almost surely, 2^128469235 is an apocalyptic number.

128469235 is a deficient number, since it is larger than the sum of its proper divisors (25693853).

128469235 is an equidigital number, since it uses as much as digits as its factorization.

128469235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25693852.

The product of its digits is 103680, while the sum is 40.

The square root of 128469235 is about 11334.4269815461. The cubic root of 128469235 is about 504.5835013083.

The spelling of 128469235 in words is "one hundred twenty-eight million, four hundred sixty-nine thousand, two hundred thirty-five".