16304425 has 12 divisors (see below), whose sum is σ = 20267676. Its totient is φ = 13011200.

The previous prime is 16304423. The next prime is 16304459. The reversal of 16304425 is 52440361.

16304425 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 1024144 + 15280281 = 1012^2 + 3909^2 .

It is not a de Polignac number, because 16304425 - 2¹ = 16304423 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 16304425.

It is not an unprimeable number, because it can be changed into a prime (16304423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18597 + ... + 19453.

It is an arithmetic number, because the mean of its divisors is an integer number (1688973).

Almost surely, 2^16304425 is an apocalyptic number.

It is an amenable number.

16304425 is a deficient number, since it is larger than the sum of its proper divisors (3963251).

16304425 is an equidigital number, since it uses as much as digits as its factorization.

16304425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1628 (or 1623 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 16304425 is about 4037.8738217037. The cubic root of 16304425 is about 253.5723112352.

Adding to 16304425 its reverse (52440361), we get a palindrome (68744786).

The spelling of 16304425 in words is "sixteen million, three hundred four thousand, four hundred twenty-five".