405247 has 2 divisors, whose sum is σ = 405248. Its totient is φ = 405246.

The previous prime is 405241. The next prime is 405253. The reversal of 405247 is 742504.

It is a balanced prime because it is at equal distance from previous prime (405241) and next prime (405253).

It is a cyclic number.

It is not a de Polignac number, because 405247 - 2³ = 405239 is a prime.

It is a plaindrome in base 13.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 405247.

It is not a weakly prime, because it can be changed into another prime (405241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202623 + 202624.

It is an arithmetic number, because the mean of its divisors is an integer number (202624).

2⁴⁰⁵²⁴⁷ is an apocalyptic number.

405247 is a deficient number, since it is larger than the sum of its proper divisors (1).

405247 is an equidigital number, since it uses as much as digits as its factorization.

405247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 22.

The square root of 405247 is about 636.5901350162. The cubic root of 405247 is about 74.0014000222.

The spelling of 405247 in words is "four hundred five thousand, two hundred forty-seven".