103721 has 8 divisors (see below), whose sum is σ = 112320. Its totient is φ = 95472.

The previous prime is 103703. The next prime is 103723. The reversal of 103721 is 127301.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 103721 - 2⁶ = 103657 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 103696 and 103705.

It is not an unprimeable number, because it can be changed into a prime (103723) 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, 956 + ... + 1058.

It is an arithmetic number, because the mean of its divisors is an integer number (14040).

2¹⁰³⁷²¹ is an apocalyptic number.

It is an amenable number.

103721 is a deficient number, since it is larger than the sum of its proper divisors (8599).

103721 is a wasteful number, since it uses less digits than its factorization.

103721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175.

The product of its (nonzero) digits is 42, while the sum is 14.

The square root of 103721 is about 322.0574482915. The cubic root of 103721 is about 46.9846033769.

The spelling of 103721 in words is "one hundred three thousand, seven hundred twenty-one", and thus it is an iban number.