15897061 has 2 divisors, whose sum is σ = 15897062. Its totient is φ = 15897060.

The previous prime is 15897059. The next prime is 15897067. The reversal of 15897061 is 16079851.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15760900 + 136161 = 3970^2 + 369^2 .

It is a cyclic number.

It is not a de Polignac number, because 15897061 - 2¹ = 15897059 is a prime.

Together with 15897059, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 15897061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (15897067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7948530 + 7948531.

It is an arithmetic number, because the mean of its divisors is an integer number (7948531).

Almost surely, 2^15897061 is an apocalyptic number.

It is an amenable number.

15897061 is a deficient number, since it is larger than the sum of its proper divisors (1).

15897061 is an equidigital number, since it uses as much as digits as its factorization.

15897061 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 15897061 is about 3987.1118619873. Note that the first 3 decimals coincide. The cubic root of 15897061 is about 251.4426510188.

The spelling of 15897061 in words is "fifteen million, eight hundred ninety-seven thousand, sixty-one".