43340641 has 2 divisors, whose sum is σ = 43340642. Its totient is φ = 43340640.

The previous prime is 43340629. The next prime is 43340657. The reversal of 43340641 is 14604334.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39955041 + 3385600 = 6321^2 + 1840^2 .

It is a cyclic number.

It is not a de Polignac number, because 43340641 - 2⁷ = 43340513 is a prime.

It is a super-2 number, since 2×43340641² = 3756822324581762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43340621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21670320 + 21670321.

It is an arithmetic number, because the mean of its divisors is an integer number (21670321).

Almost surely, 2^43340641 is an apocalyptic number.

It is an amenable number.

43340641 is a deficient number, since it is larger than the sum of its proper divisors (1).

43340641 is an equidigital number, since it uses as much as digits as its factorization.

43340641 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 43340641 is about 6583.3609197734. The cubic root of 43340641 is about 351.2624909123.

Adding to 43340641 its reverse (14604334), we get a palindrome (57944975).

The spelling of 43340641 in words is "forty-three million, three hundred forty thousand, six hundred forty-one".