128212426 has 4 divisors (see below), whose sum is σ = 192318642. Its totient is φ = 64106212.

The previous prime is 128212411. The next prime is 128212433. The reversal of 128212426 is 624212821.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 116618401 + 11594025 = 10799^2 + 3405^2 .

It is a junction number, because it is equal to n+sod(n) for n = 128212394 and 128212403.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32053105 + ... + 32053108.

Almost surely, 2^128212426 is an apocalyptic number.

128212426 is a deficient number, since it is larger than the sum of its proper divisors (64106216).

128212426 is an equidigital number, since it uses as much as digits as its factorization.

128212426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64106215.

The product of its digits is 3072, while the sum is 28.

The square root of 128212426 is about 11323.0925987559. The cubic root of 128212426 is about 504.2470575296.

The spelling of 128212426 in words is "one hundred twenty-eight million, two hundred twelve thousand, four hundred twenty-six".