16941561 has 16 divisors (see below), whose sum is σ = 27801984. Its totient is φ = 8936064.

The previous prime is 16941541. The next prime is 16941563. The reversal of 16941561 is 16514961.

It is not a de Polignac number, because 16941561 - 2⁶ = 16941497 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (16941563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30756 + ... + 31301.

It is an arithmetic number, because the mean of its divisors is an integer number (1737624).

Almost surely, 2^16941561 is an apocalyptic number.

It is an amenable number.

16941561 is a deficient number, since it is larger than the sum of its proper divisors (10860423).

16941561 is a wasteful number, since it uses less digits than its factorization.

16941561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62080.

The product of its digits is 6480, while the sum is 33.

The square root of 16941561 is about 4116.0127550823. The cubic root of 16941561 is about 256.8331872318.

The spelling of 16941561 in words is "sixteen million, nine hundred forty-one thousand, five hundred sixty-one".