128265895 has 8 divisors (see below), whose sum is σ = 154035504. Its totient is φ = 102535104.

The previous prime is 128265887. The next prime is 128265923. The reversal of 128265895 is 598562821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128265895 - 2³ = 128265887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1854 + ... + 16123.

It is an arithmetic number, because the mean of its divisors is an integer number (19254438).

Almost surely, 2^128265895 is an apocalyptic number.

128265895 is a deficient number, since it is larger than the sum of its proper divisors (25769609).

128265895 is a wasteful number, since it uses less digits than its factorization.

128265895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19409.

The product of its digits is 345600, while the sum is 46.

The square root of 128265895 is about 11325.4534125570. The cubic root of 128265895 is about 504.3171439210.

It can be divided in two parts, 12826 and 5895, that added together give a triangular number (18721 = T₁₉₃).

The spelling of 128265895 in words is "one hundred twenty-eight million, two hundred sixty-five thousand, eight hundred ninety-five".