16212004 has 6 divisors (see below), whose sum is σ = 28371014. Its totient is φ = 8106000.

The previous prime is 16211971. The next prime is 16212013. The reversal of 16212004 is 40021261.

It can be written as a sum of positive squares in only one way, i.e., 11546404 + 4665600 = 3398^2 + 2160^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2026497 + ... + 2026504.

Almost surely, 2^16212004 is an apocalyptic number.

It is an amenable number.

16212004 is a deficient number, since it is larger than the sum of its proper divisors (12159010).

16212004 is a wasteful number, since it uses less digits than its factorization.

16212004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4053005 (or 4053003 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 16212004 is about 4026.4132922491. The cubic root of 16212004 is about 253.0922814795.

Adding to 16212004 its reverse (40021261), we get a palindrome (56233265).

The spelling of 16212004 in words is "sixteen million, two hundred twelve thousand, four".