405874247 has 2 divisors, whose sum is σ = 405874248. Its totient is φ = 405874246.

The previous prime is 405874229. The next prime is 405874277. The reversal of 405874247 is 742478504.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 405874247 - 2¹⁴ = 405857863 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (405874277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 202937123 + 202937124.

It is an arithmetic number, because the mean of its divisors is an integer number (202937124).

Almost surely, 2^405874247 is an apocalyptic number.

405874247 is a deficient number, since it is larger than the sum of its proper divisors (1).

405874247 is an equidigital number, since it uses as much as digits as its factorization.

405874247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 250880, while the sum is 41.

The square root of 405874247 is about 20146.3209296387. The cubic root of 405874247 is about 740.3956047609.

The spelling of 405874247 in words is "four hundred five million, eight hundred seventy-four thousand, two hundred forty-seven".