128022605 has 8 divisors (see below), whose sum is σ = 153690264. Its totient is φ = 102376000.

The previous prime is 128022599. The next prime is 128022607. The reversal of 128022605 is 506220821.

It can be written as a sum of positive squares in 4 ways, for example, as 29735209 + 98287396 = 5453^2 + 9914^2 .

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

It is not a de Polignac number, because 128022605 - 2¹² = 128018509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128022607) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15755 + ... + 22455.

It is an arithmetic number, because the mean of its divisors is an integer number (19211283).

Almost surely, 2^128022605 is an apocalyptic number.

It is an amenable number.

128022605 is a deficient number, since it is larger than the sum of its proper divisors (25667659).

128022605 is an equidigital number, since it uses as much as digits as its factorization.

128022605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10527.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 128022605 is about 11314.7074641813. The cubic root of 128022605 is about 503.9980854152.

The spelling of 128022605 in words is "one hundred twenty-eight million, twenty-two thousand, six hundred five".