405047 has 2 divisors, whose sum is σ = 405048. Its totient is φ = 405046.

The previous prime is 405037. The next prime is 405049. The reversal of 405047 is 740504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 405047 - 2⁶ = 404983 is a prime.

Together with 405049, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202523 + 202524.

It is an arithmetic number, because the mean of its divisors is an integer number (202524).

2⁴⁰⁵⁰⁴⁷ is an apocalyptic number.

405047 is a deficient number, since it is larger than the sum of its proper divisors (1).

405047 is an equidigital number, since it uses as much as digits as its factorization.

405047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 560, while the sum is 20.

The square root of 405047 is about 636.4330286841. The cubic root of 405047 is about 73.9892241431.

The spelling of 405047 in words is "four hundred five thousand, forty-seven".