128250173 has 4 divisors (see below), whose sum is σ = 131378268. Its totient is φ = 125122080.

The previous prime is 128250137. The next prime is 128250217. The reversal of 128250173 is 371052821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 371052821 = 1427 ⋅260023.

It can be written as a sum of positive squares in 2 ways, for example, as 67207204 + 61042969 = 8198^2 + 7813^2 .

It is a cyclic number.

It is not a de Polignac number, because 128250173 - 2¹² = 128246077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128250113) 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, 1563986 + ... + 1564067.

It is an arithmetic number, because the mean of its divisors is an integer number (32844567).

Almost surely, 2^128250173 is an apocalyptic number.

It is an amenable number.

128250173 is a deficient number, since it is larger than the sum of its proper divisors (3128095).

128250173 is an equidigital number, since it uses as much as digits as its factorization.

128250173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3128094.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 128250173 is about 11324.7592910401. The cubic root of 128250173 is about 504.2965377729.

The spelling of 128250173 in words is "one hundred twenty-eight million, two hundred fifty thousand, one hundred seventy-three".