16532421 has 8 divisors (see below), whose sum is σ = 22353984. Its totient is φ = 10866240.

The previous prime is 16532401. The next prime is 16532441. The reversal of 16532421 is 12423561.

It is an interprime number because it is at equal distance from previous prime (16532401) and next prime (16532441).

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

It is not a de Polignac number, because 16532421 - 2¹⁴ = 16516037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16532391 and 16532400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16532401) 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, 38596 + ... + 39021.

It is an arithmetic number, because the mean of its divisors is an integer number (2794248).

Almost surely, 2^16532421 is an apocalyptic number.

It is an amenable number.

16532421 is a deficient number, since it is larger than the sum of its proper divisors (5821563).

16532421 is an equidigital number, since it uses as much as digits as its factorization.

16532421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77691.

The product of its digits is 1440, while the sum is 24.

The square root of 16532421 is about 4066.0079931058. The cubic root of 16532421 is about 254.7488029958.

Adding to 16532421 its reverse (12423561), we get a palindrome (28955982).

The spelling of 16532421 in words is "sixteen million, five hundred thirty-two thousand, four hundred twenty-one".