13646461 has 4 divisors (see below), whose sum is σ = 14449212. Its totient is φ = 12843712.

The previous prime is 13646453. The next prime is 13646471. The reversal of 13646461 is 16464631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 16464631 = 431 ⋅38201.

It can be written as a sum of positive squares in 2 ways, for example, as 9211225 + 4435236 = 3035^2 + 2106^2 .

It is a cyclic number.

It is not a de Polignac number, because 13646461 - 2³ = 13646453 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13646471) 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 in 3 ways as a sum of consecutive naturals, for example, 401350 + ... + 401383.

It is an arithmetic number, because the mean of its divisors is an integer number (3612303).

Almost surely, 2^13646461 is an apocalyptic number.

It is an amenable number.

13646461 is a deficient number, since it is larger than the sum of its proper divisors (802751).

13646461 is an equidigital number, since it uses as much as digits as its factorization.

13646461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 802750.

The product of its digits is 10368, while the sum is 31.

The square root of 13646461 is about 3694.1116658813. Note that the first 3 decimals coincide. The cubic root of 13646461 is about 238.9681452383.

The spelling of 13646461 in words is "thirteen million, six hundred forty-six thousand, four hundred sixty-one".