16280401 has 4 divisors (see below), whose sum is σ = 16556400. Its totient is φ = 16004404.

The previous prime is 16280393. The next prime is 16280423. The reversal of 16280401 is 10408261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10408261 = 1873 ⋅5557.

It is a cyclic number.

It is not a de Polignac number, because 16280401 - 2³ = 16280393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16220401) 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 3 ways as a sum of consecutive naturals, for example, 137911 + ... + 138028.

It is an arithmetic number, because the mean of its divisors is an integer number (4139100).

Almost surely, 2^16280401 is an apocalyptic number.

It is an amenable number.

16280401 is a deficient number, since it is larger than the sum of its proper divisors (275999).

16280401 is an equidigital number, since it uses as much as digits as its factorization.

16280401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275998.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 16280401 is about 4034.8978921405. The cubic root of 16280401 is about 253.4477067044.

Adding to 16280401 its reverse (10408261), we get a palindrome (26688662).

The spelling of 16280401 in words is "sixteen million, two hundred eighty thousand, four hundred one".