13421724 has 24 divisors (see below), whose sum is σ = 31624320. Its totient is φ = 4430064.

The previous prime is 13421717. The next prime is 13421731. The reversal of 13421724 is 42712431.

It is a happy number.

13421724 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (13421717) and next prime (13421731).

It is a junction number, because it is equal to n+sod(n) for n = 13421694 and 13421703.

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, 4194 + ... + 6665.

It is an arithmetic number, because the mean of its divisors is an integer number (1317680).

Almost surely, 2^13421724 is an apocalyptic number.

It is an amenable number.

13421724 is an abundant number, since it is smaller than the sum of its proper divisors (18202596).

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

13421724 is a wasteful number, since it uses less digits than its factorization.

13421724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10969 (or 10967 counting only the distinct ones).

The product of its digits is 1344, while the sum is 24.

The square root of 13421724 is about 3663.5671141662. The cubic root of 13421724 is about 237.6490602589.

The spelling of 13421724 in words is "thirteen million, four hundred twenty-one thousand, seven hundred twenty-four".