16599121 has 8 divisors (see below), whose sum is σ = 20695104. Its totient is φ = 12934320.

The previous prime is 16599113. The next prime is 16599127. The reversal of 16599121 is 12199561.

It is a happy number.

16599121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16599121 - 2³ = 16599113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16599127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 107710 + ... + 107863.

It is an arithmetic number, because the mean of its divisors is an integer number (2586888).

Almost surely, 2^16599121 is an apocalyptic number.

16599121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

16599121 is a deficient number, since it is larger than the sum of its proper divisors (4095983).

16599121 is a wasteful number, since it uses less digits than its factorization.

16599121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215591.

The product of its digits is 4860, while the sum is 34.

The square root of 16599121 is about 4074.2018850322. The cubic root of 16599121 is about 255.0909377058.

The spelling of 16599121 in words is "sixteen million, five hundred ninety-nine thousand, one hundred twenty-one".