128525943 has 16 divisors (see below), whose sum is σ = 210914816. Its totient is φ = 67793760.

The previous prime is 128525927. The next prime is 128525951. The reversal of 128525943 is 349525821.

It is not a de Polignac number, because 128525943 - 2⁴ = 128525927 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128525923) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 235123 + ... + 235668.

It is an arithmetic number, because the mean of its divisors is an integer number (13182176).

Almost surely, 2^128525943 is an apocalyptic number.

128525943 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

128525943 is a deficient number, since it is larger than the sum of its proper divisors (82388873).

128525943 is a wasteful number, since it uses less digits than its factorization.

128525943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470814.

The product of its digits is 86400, while the sum is 39.

The square root of 128525943 is about 11336.9282876800. The cubic root of 128525943 is about 504.6577336385.

The spelling of 128525943 in words is "one hundred twenty-eight million, five hundred twenty-five thousand, nine hundred forty-three".