128252417547242 has 8 divisors (see below), whose sum is σ = 195013949969316. Its totient is φ = 63247767557472.

The previous prime is 128252417547217. The next prime is 128252417547253. The reversal of 128252417547242 is 242745714252821.

It can be written as a sum of positive squares in 2 ways, for example, as 122874985840201 + 5377431707041 = 11084899^2 + 2318929^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439220607893 + ... + 439220608184.

Almost surely, 2^{128252417547242} is an apocalyptic number.

128252417547242 is a deficient number, since it is larger than the sum of its proper divisors (66761532422074).

128252417547242 is an equidigital number, since it uses as much as digits as its factorization.

128252417547242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878441216152.

The product of its digits is 20070400, while the sum is 56.

The spelling of 128252417547242 in words is "one hundred twenty-eight trillion, two hundred fifty-two billion, four hundred seventeen million, five hundred forty-seven thousand, two hundred forty-two".