13478561 has 2 divisors, whose sum is σ = 13478562. Its totient is φ = 13478560.

The previous prime is 13478557. The next prime is 13478567. The reversal of 13478561 is 16587431.

13478561 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., 13366336 + 112225 = 3656^2 + 335^2 .

It is a cyclic number.

It is not a de Polignac number, because 13478561 - 2² = 13478557 is a prime.

It is a Chen prime.

It is equal to p₈₇₈₃₄₅ and since 13478561 and 878345 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (13478567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6739280 + 6739281.

It is an arithmetic number, because the mean of its divisors is an integer number (6739281).

Almost surely, 2^13478561 is an apocalyptic number.

It is an amenable number.

13478561 is a deficient number, since it is larger than the sum of its proper divisors (1).

13478561 is an equidigital number, since it uses as much as digits as its factorization.

13478561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 35.

The square root of 13478561 is about 3671.3159765948. The cubic root of 13478561 is about 237.9840454903.

The spelling of 13478561 in words is "thirteen million, four hundred seventy-eight thousand, five hundred sixty-one".