252128401 has 8 divisors (see below), whose sum is σ = 290416640. Its totient is φ = 214407648.

The previous prime is 252128287. The next prime is 252128431. The reversal of 252128401 is 104821252.

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

It is a de Polignac number, because none of the positive numbers 2^k-252128401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252128431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140916 + ... + 142693.

It is an arithmetic number, because the mean of its divisors is an integer number (36302080).

Almost surely, 2^252128401 is an apocalyptic number.

It is an amenable number.

252128401 is a deficient number, since it is larger than the sum of its proper divisors (38288239).

252128401 is a wasteful number, since it uses less digits than its factorization.

252128401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283743.

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 252128401 is about 15878.5516027124. The cubic root of 252128401 is about 631.7432202393.

Adding to 252128401 its reverse (104821252), we get a palindrome (356949653).

The spelling of 252128401 in words is "two hundred fifty-two million, one hundred twenty-eight thousand, four hundred one".