405241243 has 8 divisors (see below), whose sum is σ = 446374656. Its totient is φ = 364823400.

The previous prime is 405241241. The next prime is 405241247. The reversal of 405241243 is 342142504.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 405241243 - 2¹ = 405241241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (405241241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177703 + ... + 179968.

It is an arithmetic number, because the mean of its divisors is an integer number (55796832).

Almost surely, 2^405241243 is an apocalyptic number.

405241243 is a deficient number, since it is larger than the sum of its proper divisors (41133413).

405241243 is a wasteful number, since it uses less digits than its factorization.

405241243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357785.

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 405241243 is about 20130.6046357282. The cubic root of 405241243 is about 740.0104959553.

Adding to 405241243 its reverse (342142504), we get a palindrome (747383747).

The spelling of 405241243 in words is "four hundred five million, two hundred forty-one thousand, two hundred forty-three".