128612026 has 24 divisors (see below), whose sum is σ = 207509364. Its totient is φ = 59754240.

The previous prime is 128612023. The next prime is 128612047. The reversal of 128612026 is 620216821.

It can be written as a sum of positive squares in 2 ways, for example, as 121022001 + 7590025 = 11001^2 + 2755^2 .

It is a junction number, because it is equal to n+sod(n) for n = 128611985 and 128612003.

It is not an unprimeable number, because it can be changed into a prime (128612023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36586 + ... + 39946.

Almost surely, 2^128612026 is an apocalyptic number.

128612026 is a deficient number, since it is larger than the sum of its proper divisors (78897338).

128612026 is a wasteful number, since it uses less digits than its factorization.

128612026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3454 (or 3435 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 128612026 is about 11340.7242273146. The cubic root of 128612026 is about 504.7703769318.

Adding to 128612026 its reverse (620216821), we get a palindrome (748828847).

The spelling of 128612026 in words is "one hundred twenty-eight million, six hundred twelve thousand, twenty-six".