43420141 has 4 divisors (see below), whose sum is σ = 43491132. Its totient is φ = 43349152.

The previous prime is 43420133. The next prime is 43420199. The reversal of 43420141 is 14102434.

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 570025 + 42850116 = 755^2 + 6546^2 .

It is a cyclic number.

It is not a de Polignac number, because 43420141 - 2³ = 43420133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43420241) 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, 34570 + ... + 35803.

It is an arithmetic number, because the mean of its divisors is an integer number (10872783).

Almost surely, 2^43420141 is an apocalyptic number.

43420141 is the 4168-th centered pentagonal number.

It is an amenable number.

43420141 is a deficient number, since it is larger than the sum of its proper divisors (70991).

43420141 is an equidigital number, since it uses as much as digits as its factorization.

43420141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70990.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 43420141 is about 6589.3961028307. The cubic root of 43420141 is about 351.4771340294.

Adding to 43420141 its reverse (14102434), we get a palindrome (57522575).

The spelling of 43420141 in words is "forty-three million, four hundred twenty thousand, one hundred forty-one".