128105546 has 4 divisors (see below), whose sum is σ = 192158322. Its totient is φ = 64052772.

The previous prime is 128105539. The next prime is 128105569. The reversal of 128105546 is 645501821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 645501821 = 223 ⋅2894627.

It can be written as a sum of positive squares in only one way, i.e., 117961321 + 10144225 = 10861^2 + 3185^2 .

It is a super-2 number, since 2×128105546² = 32822061831916232, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32026385 + ... + 32026388.

Almost surely, 2^128105546 is an apocalyptic number.

128105546 is a deficient number, since it is larger than the sum of its proper divisors (64052776).

128105546 is an equidigital number, since it uses as much as digits as its factorization.

128105546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64052775.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 128105546 is about 11318.3720560865. The cubic root of 128105546 is about 504.1069023467.

The spelling of 128105546 in words is "one hundred twenty-eight million, one hundred five thousand, five hundred forty-six".