406501243 has 2 divisors, whose sum is σ = 406501244. Its totient is φ = 406501242.

The previous prime is 406501187. The next prime is 406501259. The reversal of 406501243 is 342105604.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 406501243 - 2¹³ = 406493051 is a prime.

It is not a weakly prime, because it can be changed into another prime (406501273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203250621 + 203250622.

It is an arithmetic number, because the mean of its divisors is an integer number (203250622).

Almost surely, 2^406501243 is an apocalyptic number.

406501243 is a deficient number, since it is larger than the sum of its proper divisors (1).

406501243 is an equidigital number, since it uses as much as digits as its factorization.

406501243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 406501243 is about 20161.8759791841. The cubic root of 406501243 is about 740.7766638742.

Adding to 406501243 its reverse (342105604), we get a palindrome (748606847).

The spelling of 406501243 in words is "four hundred six million, five hundred one thousand, two hundred forty-three".