13661854 has 8 divisors (see below), whose sum is σ = 20517840. Its totient is φ = 6822576.

The previous prime is 13661849. The next prime is 13661861. The reversal of 13661854 is 45816631.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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, 1879 + ... + 5554.

It is an arithmetic number, because the mean of its divisors is an integer number (2564730).

Almost surely, 2^13661854 is an apocalyptic number.

13661854 is a deficient number, since it is larger than the sum of its proper divisors (6855986).

13661854 is an equidigital number, since it uses as much as digits as its factorization.

13661854 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8354.

The product of its digits is 17280, while the sum is 34.

The square root of 13661854 is about 3696.1945295128. The cubic root of 13661854 is about 239.0579622845.

The spelling of 13661854 in words is "thirteen million, six hundred sixty-one thousand, eight hundred fifty-four".