16121304 has 48 divisors (see below), whose sum is σ = 46233720. Its totient is φ = 5057280.

The previous prime is 16121279. The next prime is 16121309. The reversal of 16121304 is 40312161.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16121309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5362 + ... + 7809.

Almost surely, 2^16121304 is an apocalyptic number.

It is an amenable number.

16121304 is an abundant number, since it is smaller than the sum of its proper divisors (30112416).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16121304 is a wasteful number, since it uses less digits than its factorization.

16121304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13200 (or 13193 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 16121304 is about 4015.1343688599. The cubic root of 16121304 is about 252.6194135041.

Adding to 16121304 its reverse (40312161), we get a palindrome (56433465).

It can be divided in two parts, 1612 and 1304, that added together give a square (2916 = 54²).

The spelling of 16121304 in words is "sixteen million, one hundred twenty-one thousand, three hundred four".