13721850 has 36 divisors (see below), whose sum is σ = 36867246. Its totient is φ = 3659040.

The previous prime is 13721849. The next prime is 13721867. The reversal of 13721850 is 5812731.

13721850 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 6640929 + 7080921 = 2577^2 + 2661^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 14797 + ... + 15696.

Almost surely, 2^13721850 is an apocalyptic number.

13721850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13721850 is an abundant number, since it is smaller than the sum of its proper divisors (23145396).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13721850 is a wasteful number, since it uses less digits than its factorization.

13721850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30511 (or 30503 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 13721850 is about 3704.3015535995. The cubic root of 13721850 is about 239.4073921039.

The spelling of 13721850 in words is "thirteen million, seven hundred twenty-one thousand, eight hundred fifty".