405855243 has 6 divisors (see below), whose sum is σ = 586235364. Its totient is φ = 270570156.

The previous prime is 405855227. The next prime is 405855251. The reversal of 405855243 is 342558504.

405855243 is a `hidden beast` number, since 405 + 8 + 5 + 5 + 243 = 666.

It is not a de Polignac number, because 405855243 - 2⁴ = 405855227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 405855198 and 405855207.

It is not an unprimeable number, because it can be changed into a prime (405855283) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22547505 + ... + 22547522.

It is an arithmetic number, because the mean of its divisors is an integer number (97705894).

Almost surely, 2^405855243 is an apocalyptic number.

405855243 is a deficient number, since it is larger than the sum of its proper divisors (180380121).

405855243 is a wasteful number, since it uses less digits than its factorization.

405855243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45095033 (or 45095030 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The square root of 405855243 is about 20145.8492747265. The cubic root of 405855243 is about 740.3840488846.

The spelling of 405855243 in words is "four hundred five million, eight hundred fifty-five thousand, two hundred forty-three".