141023521 has 4 divisors (see below), whose sum is σ = 143335444. Its totient is φ = 138711600.

The previous prime is 141023507. The next prime is 141023527. The reversal of 141023521 is 125320141.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 125320141 = 17 ⋅7371773.

It can be written as a sum of positive squares in 2 ways, for example, as 31528225 + 109495296 = 5615^2 + 10464^2 .

It is a cyclic number.

It is not a de Polignac number, because 141023521 - 2⁵ = 141023489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (141023527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1155870 + ... + 1155991.

It is an arithmetic number, because the mean of its divisors is an integer number (35833861).

Almost surely, 2^141023521 is an apocalyptic number.

It is an amenable number.

141023521 is a deficient number, since it is larger than the sum of its proper divisors (2311923).

141023521 is an equidigital number, since it uses as much as digits as its factorization.

141023521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2311922.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 141023521 is about 11875.3324585041. The cubic root of 141023521 is about 520.5117262802.

Adding to 141023521 its reverse (125320141), we get a palindrome (266343662).

The spelling of 141023521 in words is "one hundred forty-one million, twenty-three thousand, five hundred twenty-one".