128903242 has 8 divisors (see below), whose sum is σ = 208228356. Its totient is φ = 59493792.

The previous prime is 128903219. The next prime is 128903263. The reversal of 128903242 is 242309821.

It can be written as a sum of positive squares in 2 ways, for example, as 127215841 + 1687401 = 11279^2 + 1299^2 .

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

It is a super-2 number, since 2×128903242² = 33232091596221128, which contains 22 as substring.

It is a zygodrome in base 3.

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, 2478883 + ... + 2478934.

Almost surely, 2^128903242 is an apocalyptic number.

128903242 is a deficient number, since it is larger than the sum of its proper divisors (79325114).

128903242 is a wasteful number, since it uses less digits than its factorization.

128903242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4957832.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 128903242 is about 11353.5563591326. The cubic root of 128903242 is about 505.1510733189.

The spelling of 128903242 in words is "one hundred twenty-eight million, nine hundred three thousand, two hundred forty-two".