405042142 has 16 divisors (see below), whose sum is σ = 611188560. Its totient is φ = 201316608.

The previous prime is 405042137. The next prime is 405042151. The reversal of 405042142 is 241240504.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 435534 + ... + 436462.

It is an arithmetic number, because the mean of its divisors is an integer number (38199285).

Almost surely, 2^405042142 is an apocalyptic number.

405042142 is a deficient number, since it is larger than the sum of its proper divisors (206146418).

405042142 is a wasteful number, since it uses less digits than its factorization.

405042142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1995.

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 405042142 is about 20125.6587966705. The cubic root of 405042142 is about 739.8892834114.

Adding to 405042142 its reverse (241240504), we get a palindrome (646282646).

The spelling of 405042142 in words is "four hundred five million, forty-two thousand, one hundred forty-two".