13505812 has 6 divisors (see below), whose sum is σ = 23635178. Its totient is φ = 6752904.

The previous prime is 13505809. The next prime is 13505813. The reversal of 13505812 is 21850531.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 12859396 + 646416 = 3586^2 + 804^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13505813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1688223 + ... + 1688230.

Almost surely, 2^13505812 is an apocalyptic number.

It is an amenable number.

13505812 is a deficient number, since it is larger than the sum of its proper divisors (10129366).

13505812 is a wasteful number, since it uses less digits than its factorization.

13505812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3376457 (or 3376455 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 13505812 is about 3675.0254420888. The cubic root of 13505812 is about 238.1443231702.

The spelling of 13505812 in words is "thirteen million, five hundred five thousand, eight hundred twelve".