13805245 has 8 divisors (see below), whose sum is σ = 16599384. Its totient is φ = 11022144.

The previous prime is 13805237. The next prime is 13805257. The reversal of 13805245 is 54250831.

It can be written as a sum of positive squares in 4 ways, for example, as 996004 + 12809241 = 998^2 + 3579^2 .

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 13805245 - 2³ = 13805237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307 + ... + 5263.

It is an arithmetic number, because the mean of its divisors is an integer number (2074923).

Almost surely, 2^13805245 is an apocalyptic number.

It is an amenable number.

13805245 is a deficient number, since it is larger than the sum of its proper divisors (2794139).

13805245 is an equidigital number, since it uses as much as digits as its factorization.

13805245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5519.

The product of its (nonzero) digits is 4800, while the sum is 28.

The square root of 13805245 is about 3715.5410104048. The cubic root of 13805245 is about 239.8914149999.

The spelling of 13805245 in words is "thirteen million, eight hundred five thousand, two hundred forty-five".