405315242 has 8 divisors (see below), whose sum is σ = 624404676. Its totient is φ = 197180352.

The previous prime is 405315233. The next prime is 405315271. The reversal of 405315242 is 242513504.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 405257161 + 58081 = 20131^2 + 241^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2738543 + ... + 2738690.

Almost surely, 2^405315242 is an apocalyptic number.

405315242 is a deficient number, since it is larger than the sum of its proper divisors (219089434).

405315242 is a wasteful number, since it uses less digits than its factorization.

405315242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5477272.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 405315242 is about 20132.4425244430. The cubic root of 405315242 is about 740.0555363725.

Adding to 405315242 its reverse (242513504), we get a palindrome (647828746).

The spelling of 405315242 in words is "four hundred five million, three hundred fifteen thousand, two hundred forty-two".