16537121 has 2 divisors, whose sum is σ = 16537122. Its totient is φ = 16537120.

The previous prime is 16537109. The next prime is 16537123. The reversal of 16537121 is 12173561.

16537121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16516096 + 21025 = 4064^2 + 145^2 .

It is an emirp because it is prime and its reverse (12173561) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16537121 - 2⁶ = 16537057 is a prime.

It is a Sophie Germain prime.

Together with 16537123, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (16537123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8268560 + 8268561.

It is an arithmetic number, because the mean of its divisors is an integer number (8268561).

Almost surely, 2^16537121 is an apocalyptic number.

It is an amenable number.

16537121 is a deficient number, since it is larger than the sum of its proper divisors (1).

16537121 is an equidigital number, since it uses as much as digits as its factorization.

16537121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1260, while the sum is 26.

The square root of 16537121 is about 4066.5859144988. The cubic root of 16537121 is about 254.7729415441.

The spelling of 16537121 in words is "sixteen million, five hundred thirty-seven thousand, one hundred twenty-one".