13451561 has 8 divisors (see below), whose sum is σ = 13933920. Its totient is φ = 12976992.

The previous prime is 13451513. The next prime is 13451617. The reversal of 13451561 is 16515431.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13451561 - 2⁶ = 13451497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13451561.

It is not an unprimeable number, because it can be changed into a prime (13456561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1685 + ... + 5453.

It is an arithmetic number, because the mean of its divisors is an integer number (1741740).

Almost surely, 2^13451561 is an apocalyptic number.

It is an amenable number.

13451561 is a deficient number, since it is larger than the sum of its proper divisors (482359).

13451561 is an equidigital number, since it uses as much as digits as its factorization.

13451561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3895.

The product of its digits is 1800, while the sum is 26.

The square root of 13451561 is about 3667.6369776738. The cubic root of 13451561 is about 237.8250308760.

Adding to 13451561 its reverse (16515431), we get a palindrome (29966992).

The spelling of 13451561 in words is "thirteen million, four hundred fifty-one thousand, five hundred sixty-one".