141721 has 4 divisors (see below), whose sum is σ = 149200. Its totient is φ = 134244.

The previous prime is 141719. The next prime is 141731. The reversal of 141721 is 127141.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 141721 - 2¹ = 141719 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a zygodrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 141695 and 141704.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 141721.

It is not an unprimeable number, because it can be changed into a prime (141731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3711 + ... + 3748.

It is an arithmetic number, because the mean of its divisors is an integer number (37300).

2¹⁴¹⁷²¹ is an apocalyptic number.

It is an amenable number.

141721 is a deficient number, since it is larger than the sum of its proper divisors (7479).

141721 is an equidigital number, since it uses as much as digits as its factorization.

141721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7478.

The product of its digits is 56, while the sum is 16.

The square root of 141721 is about 376.4584970485. The cubic root of 141721 is about 52.1368437069.

Adding to 141721 its reverse (127141), we get a palindrome (268862).

The spelling of 141721 in words is "one hundred forty-one thousand, seven hundred twenty-one", and thus it is an iban number.