128103161 has 4 divisors (see below), whose sum is σ = 129724800. Its totient is φ = 126481524.

The previous prime is 128103133. The next prime is 128103163. The reversal of 128103161 is 161301821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 161301821 = 1259 ⋅128119.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128103161 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (128103163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 810701 + ... + 810858.

It is an arithmetic number, because the mean of its divisors is an integer number (32431200).

Almost surely, 2^128103161 is an apocalyptic number.

It is an amenable number.

128103161 is a deficient number, since it is larger than the sum of its proper divisors (1621639).

128103161 is an equidigital number, since it uses as much as digits as its factorization.

128103161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1621638.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 128103161 is about 11318.2666959212. The cubic root of 128103161 is about 504.1037739304.

Adding to 128103161 its reverse (161301821), we get a palindrome (289404982).

The spelling of 128103161 in words is "one hundred twenty-eight million, one hundred three thousand, one hundred sixty-one".