128641874 has 4 divisors (see below), whose sum is σ = 192962814. Its totient is φ = 64320936.

The previous prime is 128641871. The next prime is 128641879. The reversal of 128641874 is 478146821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 125596849 + 3045025 = 11207^2 + 1745^2 .

It is not an unprimeable number, because it can be changed into a prime (128641871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32160467 + ... + 32160470.

Almost surely, 2^128641874 is an apocalyptic number.

128641874 is a deficient number, since it is larger than the sum of its proper divisors (64320940).

128641874 is an equidigital number, since it uses as much as digits as its factorization.

128641874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64320939.

The product of its digits is 86016, while the sum is 41.

The square root of 128641874 is about 11342.0401163106. The cubic root of 128641874 is about 504.8094225828.

The spelling of 128641874 in words is "one hundred twenty-eight million, six hundred forty-one thousand, eight hundred seventy-four".