15999461 has 2 divisors, whose sum is σ = 15999462. Its totient is φ = 15999460.

The previous prime is 15999457. The next prime is 15999491. The reversal of 15999461 is 16499951.

15999461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13734436 + 2265025 = 3706^2 + 1505^2 .

It is a cyclic number.

It is not a de Polignac number, because 15999461 - 2² = 15999457 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15999491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7999730 + 7999731.

It is an arithmetic number, because the mean of its divisors is an integer number (7999731).

Almost surely, 2^15999461 is an apocalyptic number.

It is an amenable number.

15999461 is a deficient number, since it is larger than the sum of its proper divisors (1).

15999461 is an equidigital number, since it uses as much as digits as its factorization.

15999461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 87480, while the sum is 44.

The square root of 15999461 is about 3999.9326244326. The cubic root of 15999461 is about 251.9813803745.

The spelling of 15999461 in words is "fifteen million, nine hundred ninety-nine thousand, four hundred sixty-one".