15999241 has 2 divisors, whose sum is σ = 15999242. Its totient is φ = 15999240.

The previous prime is 15999239. The next prime is 15999251. The reversal of 15999241 is 14299951.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15768841 + 230400 = 3971^2 + 480^2 .

It is a cyclic number.

It is not a de Polignac number, because 15999241 - 2¹ = 15999239 is a prime.

Together with 15999239, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 15999194 and 15999203.

It is not a weakly prime, because it can be changed into another prime (15999251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7999620 + 7999621.

It is an arithmetic number, because the mean of its divisors is an integer number (7999621).

Almost surely, 2^15999241 is an apocalyptic number.

It is an amenable number.

15999241 is a deficient number, since it is larger than the sum of its proper divisors (1).

15999241 is an equidigital number, since it uses as much as digits as its factorization.

15999241 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29160, while the sum is 40.

The square root of 15999241 is about 3999.9051238748. The cubic root of 15999241 is about 251.9802254156.

The spelling of 15999241 in words is "fifteen million, nine hundred ninety-nine thousand, two hundred forty-one".