405142042 has 8 divisors (see below), whose sum is σ = 611441856. Its totient is φ = 201328092.

The previous prime is 405142039. The next prime is 405142051. The reversal of 405142042 is 240241504.

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, 621058 + ... + 621709.

It is an arithmetic number, because the mean of its divisors is an integer number (76430232).

Almost surely, 2^405142042 is an apocalyptic number.

405142042 is a deficient number, since it is larger than the sum of its proper divisors (206299814).

405142042 is a wasteful number, since it uses less digits than its factorization.

405142042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242932.

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

The square root of 405142042 is about 20128.1405499862. The cubic root of 405142042 is about 739.9501074227.

Adding to 405142042 its reverse (240241504), we get a palindrome (645383546).

The spelling of 405142042 in words is "four hundred five million, one hundred forty-two thousand, forty-two".