141242021 has 4 divisors (see below), whose sum is σ = 142829100. Its totient is φ = 139654944.

The previous prime is 141242009. The next prime is 141242051. The reversal of 141242021 is 120242141.

141242021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 49350625 + 91891396 = 7025^2 + 9586^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-141242021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (141242051) 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, 793406 + ... + 793583.

It is an arithmetic number, because the mean of its divisors is an integer number (35707275).

Almost surely, 2^141242021 is an apocalyptic number.

It is an amenable number.

141242021 is a deficient number, since it is larger than the sum of its proper divisors (1587079).

141242021 is an equidigital number, since it uses as much as digits as its factorization.

141242021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1587078.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 141242021 is about 11884.5286402112. The cubic root of 141242021 is about 520.7804122500.

Adding to 141242021 its reverse (120242141), we get a palindrome (261484162).

The spelling of 141242021 in words is "one hundred forty-one million, two hundred forty-two thousand, twenty-one".