16834561 has 4 divisors (see below), whose sum is σ = 16843012. Its totient is φ = 16826112.

The previous prime is 16834553. The next prime is 16834567. The reversal of 16834561 is 16543861.

It is a happy number.

16834561 is nontrivially palindromic in base 16.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 16543861 = 257 ⋅64373.

It can be written as a sum of positive squares in 2 ways, for example, as 15752961 + 1081600 = 3969^2 + 1040^2 .

It is a cyclic number.

It is not a de Polignac number, because 16834561 - 2³ = 16834553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16834567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 601 + ... + 5833.

It is an arithmetic number, because the mean of its divisors is an integer number (4210753).

It is a Proth number, since it is equal to 2055 ⋅ 2¹³ + 1 and 2055 < 2¹³.

Almost surely, 2^16834561 is an apocalyptic number.

It is an amenable number.

16834561 is a deficient number, since it is larger than the sum of its proper divisors (8451).

16834561 is an equidigital number, since it uses as much as digits as its factorization.

16834561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8450.

The product of its digits is 17280, while the sum is 34.

The square root of 16834561 is about 4102.9941506173. The cubic root of 16834561 is about 256.2913400684.

The spelling of 16834561 in words is "sixteen million, eight hundred thirty-four thousand, five hundred sixty-one".