128547394 has 4 divisors (see below), whose sum is σ = 192821094. Its totient is φ = 64273696.

The previous prime is 128547389. The next prime is 128547427. The reversal of 128547394 is 493745821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 493745821 = 41 ⋅12042581.

It can be written as a sum of positive squares in only one way, i.e., 123543225 + 5004169 = 11115^2 + 2237^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128547394.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32136847 + ... + 32136850.

Almost surely, 2^128547394 is an apocalyptic number.

128547394 is a deficient number, since it is larger than the sum of its proper divisors (64273700).

128547394 is an equidigital number, since it uses as much as digits as its factorization.

128547394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64273699.

The product of its digits is 241920, while the sum is 43.

The square root of 128547394 is about 11337.8743157613. The cubic root of 128547394 is about 504.6858078950.

The spelling of 128547394 in words is "one hundred twenty-eight million, five hundred forty-seven thousand, three hundred ninety-four".