128130105 has 32 divisors (see below), whose sum is σ = 217728000. Its totient is φ = 64120832.

The previous prime is 128130089. The next prime is 128130137. The reversal of 128130105 is 501031821.

It is a cyclic number.

It is not a de Polignac number, because 128130105 - 2⁴ = 128130089 is a prime.

It is a super-2 number, since 2×128130105² = 32834647614622050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121621 + ... + 122669.

It is an arithmetic number, because the mean of its divisors is an integer number (6804000).

Almost surely, 2^128130105 is an apocalyptic number.

128130105 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128130105 is a deficient number, since it is larger than the sum of its proper divisors (89597895).

128130105 is a wasteful number, since it uses less digits than its factorization.

128130105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 128130105 is about 11319.4569216018. The cubic root of 128130105 is about 504.1391142499.

Adding to 128130105 its reverse (501031821), we get a palindrome (629161926).

The spelling of 128130105 in words is "one hundred twenty-eight million, one hundred thirty thousand, one hundred five".