406005042 has 16 divisors (see below), whose sum is σ = 831815712. Its totient is φ = 132034080.

The previous prime is 406005037. The next prime is 406005073. The reversal of 406005042 is 240500604.

It is a happy 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, 824968 + ... + 825459.

It is an arithmetic number, because the mean of its divisors is an integer number (51988482).

Almost surely, 2^406005042 is an apocalyptic number.

406005042 is an abundant number, since it is smaller than the sum of its proper divisors (425810670).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

406005042 is a wasteful number, since it uses less digits than its factorization.

406005042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650473.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 406005042 is about 20149.5667943507. The cubic root of 406005042 is about 740.4751282777.

Adding to 406005042 its reverse (240500604), we get a palindrome (646505646).

The spelling of 406005042 in words is "four hundred six million, five thousand, forty-two".