16297121 has 4 divisors (see below), whose sum is σ = 16354992. Its totient is φ = 16239252.

The previous prime is 16297111. The next prime is 16297139. The reversal of 16297121 is 12179261.

16297121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16297121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16297111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28511 + ... + 29076.

It is an arithmetic number, because the mean of its divisors is an integer number (4088748).

Almost surely, 2^16297121 is an apocalyptic number.

It is an amenable number.

16297121 is a deficient number, since it is larger than the sum of its proper divisors (57871).

16297121 is an equidigital number, since it uses as much as digits as its factorization.

16297121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57870.

The product of its digits is 1512, while the sum is 29.

The square root of 16297121 is about 4036.9692840050. The cubic root of 16297121 is about 253.5344407636.

The spelling of 16297121 in words is "sixteen million, two hundred ninety-seven thousand, one hundred twenty-one".