128494001 has 4 divisors (see below), whose sum is σ = 128678004. Its totient is φ = 128310000.

The previous prime is 128493991. The next prime is 128494013. The reversal of 128494001 is 100494821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 100494821 = 7 ⋅14356403.

It can be written as a sum of positive squares in 2 ways, for example, as 93624976 + 34869025 = 9676^2 + 5905^2 .

It is a cyclic number.

It is not a de Polignac number, because 128494001 - 2¹⁰ = 128492977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128494061) 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, 90950 + ... + 92351.

It is an arithmetic number, because the mean of its divisors is an integer number (32169501).

Almost surely, 2^128494001 is an apocalyptic number.

It is an amenable number.

128494001 is a deficient number, since it is larger than the sum of its proper divisors (184003).

128494001 is an equidigital number, since it uses as much as digits as its factorization.

128494001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 184002.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 128494001 is about 11335.5194411196. The cubic root of 128494001 is about 504.6159233691.

The spelling of 128494001 in words is "one hundred twenty-eight million, four hundred ninety-four thousand, one".