141521 has 4 divisors (see below), whose sum is σ = 142692. Its totient is φ = 140352.

The previous prime is 141511. The next prime is 141529. The reversal of 141521 is 125141.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 115600 + 25921 = 340^2 + 161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-141521 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 141496 and 141505.

It is not an unprimeable number, because it can be changed into a prime (141529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380 + ... + 653.

It is an arithmetic number, because the mean of its divisors is an integer number (35673).

2¹⁴¹⁵²¹ is an apocalyptic number.

It is an amenable number.

141521 is a deficient number, since it is larger than the sum of its proper divisors (1171).

141521 is a wasteful number, since it uses less digits than its factorization.

141521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1170.

The product of its digits is 40, while the sum is 14.

The square root of 141521 is about 376.1927697338. The cubic root of 141521 is about 52.1123065818.

Adding to 141521 its reverse (125141), we get a palindrome (266662).

The spelling of 141521 in words is "one hundred forty-one thousand, five hundred twenty-one".