128036242 has 4 divisors (see below), whose sum is σ = 192054366. Its totient is φ = 64018120.

The previous prime is 128036219. The next prime is 128036257. The reversal of 128036242 is 242630821.

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., 87216921 + 40819321 = 9339^2 + 6389^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128036242.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32009059 + ... + 32009062.

Almost surely, 2^128036242 is an apocalyptic number.

128036242 is a deficient number, since it is larger than the sum of its proper divisors (64018124).

128036242 is an equidigital number, since it uses as much as digits as its factorization.

128036242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64018123.

The product of its (nonzero) digits is 4608, while the sum is 28.

The square root of 128036242 is about 11315.3100708730. The cubic root of 128036242 is about 504.0159801140.

The spelling of 128036242 in words is "one hundred twenty-eight million, thirty-six thousand, two hundred forty-two".