405305242 has 8 divisors (see below), whose sum is σ = 610106976. Its totient is φ = 201936252.

The previous prime is 405305237. The next prime is 405305261. The reversal of 405305242 is 242503504.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 357478 + ... + 358609.

It is an arithmetic number, because the mean of its divisors is an integer number (76263372).

Almost surely, 2^405305242 is an apocalyptic number.

405305242 is a deficient number, since it is larger than the sum of its proper divisors (204801734).

405305242 is a wasteful number, since it uses less digits than its factorization.

405305242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716372.

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 405305242 is about 20132.1941675516. The cubic root of 405305242 is about 740.0494500677.

Adding to 405305242 its reverse (242503504), we get a palindrome (647808746).

The spelling of 405305242 in words is "four hundred five million, three hundred five thousand, two hundred forty-two".