405065361 has 4 divisors (see below), whose sum is σ = 540087152. Its totient is φ = 270043572.

The previous prime is 405065333. The next prime is 405065377. The reversal of 405065361 is 163560504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 405065361 - 2¹⁹ = 404541073 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (405065861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67510891 + ... + 67510896.

It is an arithmetic number, because the mean of its divisors is an integer number (135021788).

Almost surely, 2^405065361 is an apocalyptic number.

It is an amenable number.

405065361 is a deficient number, since it is larger than the sum of its proper divisors (135021791).

405065361 is a wasteful number, since it uses less digits than its factorization.

405065361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135021790.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 405065361 is about 20126.2356390856. The cubic root of 405065361 is about 739.9034211675.

The spelling of 405065361 in words is "four hundred five million, sixty-five thousand, three hundred sixty-one".