13721590 has 16 divisors (see below), whose sum is σ = 24919488. Its totient is φ = 5439616.

The previous prime is 13721581. The next prime is 13721597. The reversal of 13721590 is 9512731.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13721597) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4942 + ... + 7201.

It is an arithmetic number, because the mean of its divisors is an integer number (1557468).

Almost surely, 2^13721590 is an apocalyptic number.

13721590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13721590 is a deficient number, since it is larger than the sum of its proper divisors (11197898).

13721590 is a wasteful number, since it uses less digits than its factorization.

13721590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12263.

The product of its (nonzero) digits is 1890, while the sum is 28.

The square root of 13721590 is about 3704.2664590982. The cubic root of 13721590 is about 239.4058800066.

The spelling of 13721590 in words is "thirteen million, seven hundred twenty-one thousand, five hundred ninety".