13781204 has 6 divisors (see below), whose sum is σ = 24117114. Its totient is φ = 6890600.

The previous prime is 13781179. The next prime is 13781221. The reversal of 13781204 is 40218731.

It can be written as a sum of positive squares in only one way, i.e., 13690000 + 91204 = 3700^2 + 302^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1722647 + ... + 1722654.

It is an arithmetic number, because the mean of its divisors is an integer number (4019519).

Almost surely, 2^13781204 is an apocalyptic number.

It is an amenable number.

13781204 is a deficient number, since it is larger than the sum of its proper divisors (10335910).

13781204 is a wasteful number, since it uses less digits than its factorization.

13781204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3445305 (or 3445303 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 13781204 is about 3712.3044056219. The cubic root of 13781204 is about 239.7520819538.

Adding to 13781204 its reverse (40218731), we get a palindrome (53999935).

The spelling of 13781204 in words is "thirteen million, seven hundred eighty-one thousand, two hundred four".