128901501 has 24 divisors (see below), whose sum is σ = 189968064. Its totient is φ = 84205440.

The previous prime is 128901481. The next prime is 128901523. The reversal of 128901501 is 105109821.

It is not a de Polignac number, because 128901501 - 2⁷ = 128901373 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128901551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 144880 + ... + 145766.

It is an arithmetic number, because the mean of its divisors is an integer number (7915336).

Almost surely, 2^128901501 is an apocalyptic number.

It is an amenable number.

128901501 is a deficient number, since it is larger than the sum of its proper divisors (61066563).

128901501 is a wasteful number, since it uses less digits than its factorization.

128901501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1201 (or 1198 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 27.

The square root of 128901501 is about 11353.4796868625. The cubic root of 128901501 is about 505.1487990757.

The spelling of 128901501 in words is "one hundred twenty-eight million, nine hundred one thousand, five hundred one".