128292513 has 4 divisors (see below), whose sum is σ = 171056688. Its totient is φ = 85528340.

The previous prime is 128292511. The next prime is 128292529. The reversal of 128292513 is 315292821.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 128292513 - 2¹ = 128292511 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128292511) 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, 21382083 + ... + 21382088.

It is an arithmetic number, because the mean of its divisors is an integer number (42764172).

Almost surely, 2^128292513 is an apocalyptic number.

It is an amenable number.

128292513 is a deficient number, since it is larger than the sum of its proper divisors (42764175).

128292513 is an equidigital number, since it uses as much as digits as its factorization.

128292513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42764174.

The product of its digits is 8640, while the sum is 33.

The square root of 128292513 is about 11326.6284921860. The cubic root of 128292513 is about 504.3520271487.

The spelling of 128292513 in words is "one hundred twenty-eight million, two hundred ninety-two thousand, five hundred thirteen".