128250445 has 8 divisors (see below), whose sum is σ = 154091160. Its totient is φ = 102473280.

The previous prime is 128250433. The next prime is 128250509. The reversal of 128250445 is 544052821.

It can be written as a sum of positive squares in 4 ways, for example, as 7733961 + 120516484 = 2781^2 + 10978^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-128250445 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11326 + ... + 19615.

It is an arithmetic number, because the mean of its divisors is an integer number (19261395).

Almost surely, 2^128250445 is an apocalyptic number.

It is an amenable number.

128250445 is a deficient number, since it is larger than the sum of its proper divisors (25840715).

128250445 is an equidigital number, since it uses as much as digits as its factorization.

128250445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31775.

The product of its (nonzero) digits is 12800, while the sum is 31.

The square root of 128250445 is about 11324.7713001190. The cubic root of 128250445 is about 504.2968942859.

The spelling of 128250445 in words is "one hundred twenty-eight million, two hundred fifty thousand, four hundred forty-five".