16124409 has 24 divisors (see below), whose sum is σ = 26766272. Its totient is φ = 9162720.

The previous prime is 16124401. The next prime is 16124413. The reversal of 16124409 is 90442161.

16124409 is a `hidden beast` number, since 1 + 612 + 4 + 40 + 9 = 666.

It is not a de Polignac number, because 16124409 - 2³ = 16124401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16124401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12687 + ... + 13899.

Almost surely, 2^16124409 is an apocalyptic number.

It is an amenable number.

16124409 is a deficient number, since it is larger than the sum of its proper divisors (10641863).

16124409 is a wasteful number, since it uses less digits than its factorization.

16124409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1437 (or 1434 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 16124409 is about 4015.5210122723. The cubic root of 16124409 is about 252.6356308218.

Subtracting from 16124409 its product of nonzero digits (1728), we obtain a triangular number (16122681 = T₅₆₇₈).

The spelling of 16124409 in words is "sixteen million, one hundred twenty-four thousand, four hundred nine".