128523527 has 4 divisors (see below), whose sum is σ = 140207496. Its totient is φ = 116839560.

The previous prime is 128523509. The next prime is 128523547. The reversal of 128523527 is 725325821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 725325821 = 11 ⋅65938711.

It is a cyclic number.

It is not a de Polignac number, because 128523527 - 2⁸ = 128523271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128523547) 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, 5841968 + ... + 5841989.

It is an arithmetic number, because the mean of its divisors is an integer number (35051874).

Almost surely, 2^128523527 is an apocalyptic number.

128523527 is a deficient number, since it is larger than the sum of its proper divisors (11683969).

128523527 is a wasteful number, since it uses less digits than its factorization.

128523527 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11683968.

The product of its digits is 33600, while the sum is 35.

The square root of 128523527 is about 11336.8217327433. The cubic root of 128523527 is about 504.6545714735.

The spelling of 128523527 in words is "one hundred twenty-eight million, five hundred twenty-three thousand, five hundred twenty-seven".