128937601 has 8 divisors (see below), whose sum is σ = 139129704. Its totient is φ = 118784640.

The previous prime is 128937583. The next prime is 128937619. The reversal of 128937601 is 106739821.

It is an interprime number because it is at equal distance from previous prime (128937583) and next prime (128937619).

It can be written as a sum of positive squares in 4 ways, for example, as 9144576 + 119793025 = 3024^2 + 10945^2 .

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

It is not a de Polignac number, because 128937601 - 2⁹ = 128937089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (128937631) 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, 2746 + ... + 16291.

It is an arithmetic number, because the mean of its divisors is an integer number (17391213).

Almost surely, 2^128937601 is an apocalyptic number.

It is an amenable number.

128937601 is a deficient number, since it is larger than the sum of its proper divisors (10192103).

128937601 is a wasteful number, since it uses less digits than its factorization.

128937601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19571.

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 128937601 is about 11355.0693965295. The cubic root of 128937601 is about 505.1959517967.

The spelling of 128937601 in words is "one hundred twenty-eight million, nine hundred thirty-seven thousand, six hundred one".