128641401 has 24 divisors (see below), whose sum is σ = 214755840. Its totient is φ = 72680256.

The previous prime is 128641367. The next prime is 128641433. The reversal of 128641401 is 104146821.

It is a happy number.

128641401 is a `hidden beast` number, since 12 + 8 + 641 + 4 + 0 + 1 = 666.

It is not a de Polignac number, because 128641401 - 2¹⁷ = 128510329 is a prime.

It is a super-2 number, since 2×128641401² = 33097220102485602, which contains 22 as substring.

It is a zygodrome in base 3.

It is not an unprimeable number, because it can be changed into a prime (128641481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5865 + ... + 17078.

It is an arithmetic number, because the mean of its divisors is an integer number (8948160).

Almost surely, 2^128641401 is an apocalyptic number.

It is an amenable number.

128641401 is a deficient number, since it is larger than the sum of its proper divisors (86114439).

128641401 is a wasteful number, since it uses less digits than its factorization.

128641401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23045 (or 23042 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 128641401 is about 11342.0192646636. The cubic root of 128641401 is about 504.8088038751.

The spelling of 128641401 in words is "one hundred twenty-eight million, six hundred forty-one thousand, four hundred one".