405406243 has 8 divisors (see below), whose sum is σ = 442411200. Its totient is φ = 368426280.

The previous prime is 405406231. The next prime is 405406247. The reversal of 405406243 is 342604504.

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 405406243 - 2²⁵ = 371851811 is a prime.

It is not an unprimeable number, because it can be changed into a prime (405406247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48808 + ... + 56506.

It is an arithmetic number, because the mean of its divisors is an integer number (55301400).

Almost surely, 2^405406243 is an apocalyptic number.

405406243 is a deficient number, since it is larger than the sum of its proper divisors (37004957).

405406243 is a wasteful number, since it uses less digits than its factorization.

405406243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12497.

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 405406243 is about 20134.7024562073. The cubic root of 405406243 is about 740.1109177542.

The spelling of 405406243 in words is "four hundred five million, four hundred six thousand, two hundred forty-three".