16276561 has 8 divisors (see below), whose sum is σ = 18641664. Its totient is φ = 13921440.

The previous prime is 16276553. The next prime is 16276567. The reversal of 16276561 is 16567261.

It is a happy number.

16276561 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 a cyclic number.

It is not a de Polignac number, because 16276561 - 2³ = 16276553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16276567) 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, 1416 + ... + 5878.

It is an arithmetic number, because the mean of its divisors is an integer number (2330208).

Almost surely, 2^16276561 is an apocalyptic number.

It is an amenable number.

16276561 is a deficient number, since it is larger than the sum of its proper divisors (2365103).

16276561 is an equidigital number, since it uses as much as digits as its factorization.

16276561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4991.

The product of its digits is 15120, while the sum is 34.

The square root of 16276561 is about 4034.4220156052. The cubic root of 16276561 is about 253.4277785359.

The spelling of 16276561 in words is "sixteen million, two hundred seventy-six thousand, five hundred sixty-one".