16121244 has 24 divisors (see below), whose sum is σ = 37800448. Its totient is φ = 5347440.

The previous prime is 16121243. The next prime is 16121249. The reversal of 16121244 is 44212161.

It is a happy number.

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 16121244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16121243) 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 7 ways as a sum of consecutive naturals, for example, 652 + ... + 5715.

Almost surely, 2^16121244 is an apocalyptic number.

It is an amenable number.

16121244 is an abundant number, since it is smaller than the sum of its proper divisors (21679204).

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

16121244 is a wasteful number, since it uses less digits than its factorization.

16121244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6585 (or 6583 counting only the distinct ones).

The product of its digits is 384, while the sum is 21.

The square root of 16121244 is about 4015.1268971229. The cubic root of 16121244 is about 252.6191001055.

The spelling of 16121244 in words is "sixteen million, one hundred twenty-one thousand, two hundred forty-four".