16504541 has 2 divisors, whose sum is σ = 16504542. Its totient is φ = 16504540.

The previous prime is 16504529. The next prime is 16504549. The reversal of 16504541 is 14540561.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14853316 + 1651225 = 3854^2 + 1285^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16504541 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 16504541.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16504549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8252270 + 8252271.

It is an arithmetic number, because the mean of its divisors is an integer number (8252271).

Almost surely, 2^16504541 is an apocalyptic number.

It is an amenable number.

16504541 is a deficient number, since it is larger than the sum of its proper divisors (1).

16504541 is an equidigital number, since it uses as much as digits as its factorization.

16504541 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 16504541 is about 4062.5781223258. The cubic root of 16504541 is about 254.6055210403.

The spelling of 16504541 in words is "sixteen million, five hundred four thousand, five hundred forty-one".