43141421 has 2 divisors, whose sum is σ = 43141422. Its totient is φ = 43141420.

The previous prime is 43141411. The next prime is 43141451. The reversal of 43141421 is 12414134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30680521 + 12460900 = 5539^2 + 3530^2 .

It is a cyclic number.

It is not a de Polignac number, because 43141421 - 2¹⁴ = 43125037 is a prime.

It is a super-2 number, since 2×43141421² = 3722364411798482, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a plaindrome in base 8.

It is a junction number, because it is equal to n+sod(n) for n = 43141393 and 43141402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43141411) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21570710 + 21570711.

It is an arithmetic number, because the mean of its divisors is an integer number (21570711).

Almost surely, 2^43141421 is an apocalyptic number.

It is an amenable number.

43141421 is a deficient number, since it is larger than the sum of its proper divisors (1).

43141421 is an equidigital number, since it uses as much as digits as its factorization.

43141421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 384, while the sum is 20.

The square root of 43141421 is about 6568.2129228581. The cubic root of 43141421 is about 350.7234586647.

Adding to 43141421 its reverse (12414134), we get a palindrome (55555555).

The spelling of 43141421 in words is "forty-three million, one hundred forty-one thousand, four hundred twenty-one".