406120342 has 4 divisors (see below), whose sum is σ = 609180516. Its totient is φ = 203060170.

The previous prime is 406120333. The next prime is 406120381. The reversal of 406120342 is 243021604.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101530084 + ... + 101530087.

It is an arithmetic number, because the mean of its divisors is an integer number (152295129).

Almost surely, 2^406120342 is an apocalyptic number.

406120342 is a deficient number, since it is larger than the sum of its proper divisors (203060174).

406120342 is a wasteful number, since it uses less digits than its factorization.

406120342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203060173.

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 406120342 is about 20152.4276949453. The cubic root of 406120342 is about 740.5452166533.

Adding to 406120342 its reverse (243021604), we get a palindrome (649141946).

The spelling of 406120342 in words is "four hundred six million, one hundred twenty thousand, three hundred forty-two".