43456541 has 2 divisors, whose sum is σ = 43456542. Its totient is φ = 43456540.

The previous prime is 43456489. The next prime is 43456547. The reversal of 43456541 is 14565434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22562500 + 20894041 = 4750^2 + 4571^2 .

It is a cyclic number.

It is not a de Polignac number, because 43456541 - 2¹⁴ = 43440157 is a prime.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 43456498 and 43456507.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43456547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21728270 + 21728271.

It is an arithmetic number, because the mean of its divisors is an integer number (21728271).

Almost surely, 2^43456541 is an apocalyptic number.

It is an amenable number.

43456541 is a deficient number, since it is larger than the sum of its proper divisors (1).

43456541 is an equidigital number, since it uses as much as digits as its factorization.

43456541 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28800, while the sum is 32.

The square root of 43456541 is about 6592.1575375593. The cubic root of 43456541 is about 351.5753234407.

The spelling of 43456541 in words is "forty-three million, four hundred fifty-six thousand, five hundred forty-one".