405942742 has 8 divisors (see below), whose sum is σ = 609260976. Its totient is φ = 202855752.

The previous prime is 405942721. The next prime is 405942773. The reversal of 405942742 is 247249504.

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

It is a congruent number.

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, 53353 + ... + 60484.

It is an arithmetic number, because the mean of its divisors is an integer number (76157622).

Almost surely, 2^405942742 is an apocalyptic number.

405942742 is a deficient number, since it is larger than the sum of its proper divisors (203318234).

405942742 is a wasteful number, since it uses less digits than its factorization.

405942742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115622.

The product of its (nonzero) digits is 80640, while the sum is 37.

The square root of 405942742 is about 20148.0207960981. The cubic root of 405942742 is about 740.4372519334.

The spelling of 405942742 in words is "four hundred five million, nine hundred forty-two thousand, seven hundred forty-two".