43641253 has 2 divisors, whose sum is σ = 43641254. Its totient is φ = 43641252.

The previous prime is 43641229. The next prime is 43641263. The reversal of 43641253 is 35214634.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26193924 + 17447329 = 5118^2 + 4177^2 .

It is a cyclic number.

It is not a de Polignac number, because 43641253 - 2⁹ = 43640741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43641223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21820626 + 21820627.

It is an arithmetic number, because the mean of its divisors is an integer number (21820627).

Almost surely, 2^43641253 is an apocalyptic number.

It is an amenable number.

43641253 is a deficient number, since it is larger than the sum of its proper divisors (1).

43641253 is an equidigital number, since it uses as much as digits as its factorization.

43641253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 28.

The square root of 43641253 is about 6606.1526624806. The cubic root of 43641253 is about 352.0727429078.

Adding to 43641253 its reverse (35214634), we get a palindrome (78855887).

The spelling of 43641253 in words is "forty-three million, six hundred forty-one thousand, two hundred fifty-three".