16121416 has 8 divisors (see below), whose sum is σ = 30227670. Its totient is φ = 8060704.

The previous prime is 16121411. The next prime is 16121429. The reversal of 16121416 is 61412161.

It can be written as a sum of positive squares in only one way, i.e., 11902500 + 4218916 = 3450^2 + 2054^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (16121411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1007581 + ... + 1007596.

Almost surely, 2^16121416 is an apocalyptic number.

It is an amenable number.

16121416 is a deficient number, since it is larger than the sum of its proper divisors (14106254).

16121416 is a wasteful number, since it uses less digits than its factorization.

16121416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2015183 (or 2015179 counting only the distinct ones).

The product of its digits is 288, while the sum is 22.

The square root of 16121416 is about 4015.1483160650. The cubic root of 16121416 is about 252.6199985128.

Adding to 16121416 its reverse (61412161), we get a palindrome (77533577).

The spelling of 16121416 in words is "sixteen million, one hundred twenty-one thousand, four hundred sixteen".