16075561 has 2 divisors, whose sum is σ = 16075562. Its totient is φ = 16075560.

The previous prime is 16075559. The next prime is 16075583. The reversal of 16075561 is 16557061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12559936 + 3515625 = 3544^2 + 1875^2 .

It is an emirp because it is prime and its reverse (16557061) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 16075561 - 2¹ = 16075559 is a prime.

It is a super-2 number, since 2×16075561² = 516847322929442, which contains 22 as substring.

Together with 16075559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (16075061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8037780 + 8037781.

It is an arithmetic number, because the mean of its divisors is an integer number (8037781).

Almost surely, 2^16075561 is an apocalyptic number.

It is an amenable number.

16075561 is a deficient number, since it is larger than the sum of its proper divisors (1).

16075561 is an equidigital number, since it uses as much as digits as its factorization.

16075561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 16075561 is about 4009.4339999556. The cubic root of 16075561 is about 252.3802575721.

The spelling of 16075561 in words is "sixteen million, seventy-five thousand, five hundred sixty-one".