15408961 has 2 divisors, whose sum is σ = 15408962. Its totient is φ = 15408960.

The previous prime is 15408959. The next prime is 15408977. The reversal of 15408961 is 16980451.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14868736 + 540225 = 3856^2 + 735^2 .

It is an emirp because it is prime and its reverse (16980451) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 15408961 - 2¹ = 15408959 is a prime.

Together with 15408959, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (15408931) 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, 7704480 + 7704481.

It is an arithmetic number, because the mean of its divisors is an integer number (7704481).

Almost surely, 2^15408961 is an apocalyptic number.

It is an amenable number.

15408961 is a deficient number, since it is larger than the sum of its proper divisors (1).

15408961 is an equidigital number, since it uses as much as digits as its factorization.

15408961 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 34.

The square root of 15408961 is about 3925.4249451493. The cubic root of 15408961 is about 248.8424404963.

It can be divided in two parts, 1540 and 8961, that added together give a palindrome (10501).

The spelling of 15408961 in words is "fifteen million, four hundred eight thousand, nine hundred sixty-one".