15961441 has 2 divisors, whose sum is σ = 15961442. Its totient is φ = 15961440.

The previous prime is 15961417. The next prime is 15961457. The reversal of 15961441 is 14416951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15681600 + 279841 = 3960^2 + 529^2 .

It is an emirp because it is prime and its reverse (14416951) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15961441 - 2⁷ = 15961313 is a prime.

It is not a weakly prime, because it can be changed into another prime (15964441) 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, 7980720 + 7980721.

It is an arithmetic number, because the mean of its divisors is an integer number (7980721).

Almost surely, 2^15961441 is an apocalyptic number.

It is an amenable number.

15961441 is a deficient number, since it is larger than the sum of its proper divisors (1).

15961441 is an equidigital number, since it uses as much as digits as its factorization.

15961441 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 31.

The square root of 15961441 is about 3995.1772175962. The cubic root of 15961441 is about 251.7816250871.

The spelling of 15961441 in words is "fifteen million, nine hundred sixty-one thousand, four hundred forty-one".