128420174 has 4 divisors (see below), whose sum is σ = 192630264. Its totient is φ = 64210086.

The previous prime is 128420153. The next prime is 128420177. The reversal of 128420174 is 471024821.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128420177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32105042 + ... + 32105045.

It is an arithmetic number, because the mean of its divisors is an integer number (48157566).

Almost surely, 2^128420174 is an apocalyptic number.

128420174 is a deficient number, since it is larger than the sum of its proper divisors (64210090).

128420174 is an equidigital number, since it uses as much as digits as its factorization.

128420174 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64210089.

The product of its (nonzero) digits is 3584, while the sum is 29.

The square root of 128420174 is about 11332.2625278450. The cubic root of 128420174 is about 504.5192614844.

Adding to 128420174 its reverse (471024821), we get a palindrome (599444995).

The spelling of 128420174 in words is "one hundred twenty-eight million, four hundred twenty thousand, one hundred seventy-four".