128874974 has 4 divisors (see below), whose sum is σ = 193312464. Its totient is φ = 64437486.

The previous prime is 128874971. The next prime is 128874983. The reversal of 128874974 is 479478821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 479478821 = 12539 ⋅38239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128874971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32218742 + ... + 32218745.

It is an arithmetic number, because the mean of its divisors is an integer number (48328116).

Almost surely, 2^128874974 is an apocalyptic number.

128874974 is a deficient number, since it is larger than the sum of its proper divisors (64437490).

128874974 is an equidigital number, since it uses as much as digits as its factorization.

128874974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64437489.

The product of its digits is 903168, while the sum is 50.

The square root of 128874974 is about 11352.3113946015. The cubic root of 128874974 is about 505.1141447042.

The spelling of 128874974 in words is "one hundred twenty-eight million, eight hundred seventy-four thousand, nine hundred seventy-four".