13778241 has 8 divisors (see below), whose sum is σ = 18390144. Its totient is φ = 9175920.

The previous prime is 13778231. The next prime is 13778267. The reversal of 13778241 is 14287731.

It is a happy number.

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

It is not a de Polignac number, because 13778241 - 2⁵ = 13778209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (13778221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2251 + ... + 5711.

It is an arithmetic number, because the mean of its divisors is an integer number (2298768).

Almost surely, 2^13778241 is an apocalyptic number.

It is an amenable number.

13778241 is a deficient number, since it is larger than the sum of its proper divisors (4611903).

13778241 is a wasteful number, since it uses less digits than its factorization.

13778241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4791.

The product of its digits is 9408, while the sum is 33.

The square root of 13778241 is about 3711.9053059042. The cubic root of 13778241 is about 239.7348982511.

The spelling of 13778241 in words is "thirteen million, seven hundred seventy-eight thousand, two hundred forty-one".