128901251 has 4 divisors (see below), whose sum is σ = 128954904. Its totient is φ = 128847600.

The previous prime is 128901217. The next prime is 128901257. The reversal of 128901251 is 152109821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 128901251 - 2¹⁴ = 128884867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128901257) 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, 23045 + ... + 28086.

It is an arithmetic number, because the mean of its divisors is an integer number (32238726).

Almost surely, 2^128901251 is an apocalyptic number.

128901251 is a deficient number, since it is larger than the sum of its proper divisors (53653).

128901251 is an equidigital number, since it uses as much as digits as its factorization.

128901251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53652.

The product of its (nonzero) digits is 1440, while the sum is 29.

The square root of 128901251 is about 11353.4686770167. The cubic root of 128901251 is about 505.1484725026.

It can be divided in two parts, 12890 and 1251, that added together give a palindrome (14141).

The spelling of 128901251 in words is "one hundred twenty-eight million, nine hundred one thousand, two hundred fifty-one".