16432401 has 4 divisors (see below), whose sum is σ = 21909872. Its totient is φ = 10954932.

The previous prime is 16432399. The next prime is 16432439. The reversal of 16432401 is 10423461.

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.

It is not a de Polignac number, because 16432401 - 2¹ = 16432399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16432001) 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, 2738731 + ... + 2738736.

It is an arithmetic number, because the mean of its divisors is an integer number (5477468).

Almost surely, 2^16432401 is an apocalyptic number.

It is an amenable number.

16432401 is a deficient number, since it is larger than the sum of its proper divisors (5477471).

16432401 is an equidigital number, since it uses as much as digits as its factorization.

16432401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5477470.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 16432401 is about 4053.6898006631. The cubic root of 16432401 is about 254.2340259463.

Adding to 16432401 its reverse (10423461), we get a palindrome (26855862).

The spelling of 16432401 in words is "sixteen million, four hundred thirty-two thousand, four hundred one".