43604261 has 2 divisors, whose sum is σ = 43604262. Its totient is φ = 43604260.

The previous prime is 43604227. The next prime is 43604263. The reversal of 43604261 is 16240634.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27363361 + 16240900 = 5231^2 + 4030^2 .

It is a cyclic number.

It is not a de Polignac number, because 43604261 - 2²² = 39409957 is a prime.

It is a super-2 number, since 2×43604261² = 3802663154712242, which contains 22 as substring.

Together with 43604263, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43604261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43604263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21802130 + 21802131.

It is an arithmetic number, because the mean of its divisors is an integer number (21802131).

Almost surely, 2^43604261 is an apocalyptic number.

It is an amenable number.

43604261 is a deficient number, since it is larger than the sum of its proper divisors (1).

43604261 is an equidigital number, since it uses as much as digits as its factorization.

43604261 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 26.

The square root of 43604261 is about 6603.3522547264. The cubic root of 43604261 is about 351.9732380007.

Adding to 43604261 its reverse (16240634), we get a palindrome (59844895).

The spelling of 43604261 in words is "forty-three million, six hundred four thousand, two hundred sixty-one".