13404561 has 8 divisors (see below), whose sum is σ = 18649920. Its totient is φ = 8547792.

The previous prime is 13404533. The next prime is 13404563. The reversal of 13404561 is 16540431.

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

It is not a de Polignac number, because 13404561 - 2⁵ = 13404529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13404563) 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, 97066 + ... + 97203.

It is an arithmetic number, because the mean of its divisors is an integer number (2331240).

Almost surely, 2^13404561 is an apocalyptic number.

It is an amenable number.

13404561 is a deficient number, since it is larger than the sum of its proper divisors (5245359).

13404561 is a wasteful number, since it uses less digits than its factorization.

13404561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194295.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 13404561 is about 3661.2239756672. The cubic root of 13404561 is about 237.5477193126.

Adding to 13404561 its reverse (16540431), we get a palindrome (29944992).

The spelling of 13404561 in words is "thirteen million, four hundred four thousand, five hundred sixty-one".