128001503 has 8 divisors (see below), whose sum is σ = 148767360. Its totient is φ = 107855640.

The previous prime is 128001493. The next prime is 128001529. The reversal of 128001503 is 305100821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 128001503 - 2⁶ = 128001439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128001553) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154553 + ... + 155378.

It is an arithmetic number, because the mean of its divisors is an integer number (18595920).

Almost surely, 2^128001503 is an apocalyptic number.

128001503 is a deficient number, since it is larger than the sum of its proper divisors (20765857).

128001503 is an equidigital number, since it uses as much as digits as its factorization.

128001503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309997.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 128001503 is about 11313.7749226330. The cubic root of 128001503 is about 503.9703925141.

The spelling of 128001503 in words is "one hundred twenty-eight million, one thousand, five hundred three".