141540221 has 4 divisors (see below), whose sum is σ = 141670812. Its totient is φ = 141409632.

The previous prime is 141540199. The next prime is 141540227. The reversal of 141540221 is 122045141.

It is a happy number.

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 79744900 + 61795321 = 8930^2 + 7861^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-141540221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 141540193 and 141540202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (141540227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63656 + ... + 65841.

It is an arithmetic number, because the mean of its divisors is an integer number (35417703).

Almost surely, 2^141540221 is an apocalyptic number.

It is an amenable number.

141540221 is a deficient number, since it is larger than the sum of its proper divisors (130591).

141540221 is a wasteful number, since it uses less digits than its factorization.

141540221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130590.

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 141540221 is about 11897.0677479789. The cubic root of 141540221 is about 521.1466572592.

Adding to 141540221 its reverse (122045141), we get a palindrome (263585362).

The spelling of 141540221 in words is "one hundred forty-one million, five hundred forty thousand, two hundred twenty-one".