405212042 has 8 divisors (see below), whose sum is σ = 612604416. Its totient is φ = 201010572.

The previous prime is 405212029. The next prime is 405212053. The reversal of 405212042 is 240212504.

It is a happy number.

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, 797408 + ... + 797915.

It is an arithmetic number, because the mean of its divisors is an integer number (76575552).

Almost surely, 2^405212042 is an apocalyptic number.

405212042 is a deficient number, since it is larger than the sum of its proper divisors (207392374).

405212042 is a wasteful number, since it uses less digits than its factorization.

405212042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1595452.

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 405212042 is about 20129.8793339652. The cubic root of 405212042 is about 739.9927208926.

Adding to 405212042 its reverse (240212504), we get a palindrome (645424546).

The spelling of 405212042 in words is "four hundred five million, two hundred twelve thousand, forty-two".