406142305 has 8 divisors (see below), whose sum is σ = 487499112. Its totient is φ = 324828288.

The previous prime is 406142251. The next prime is 406142327. The reversal of 406142305 is 503241604.

It can be written as a sum of positive squares in 4 ways, for example, as 107682129 + 298460176 = 10377^2 + 17276^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 406142305 - 2⁹ = 406141793 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 406142305.

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, 16459 + ... + 32911.

It is an arithmetic number, because the mean of its divisors is an integer number (60937389).

Almost surely, 2^406142305 is an apocalyptic number.

It is an amenable number.

406142305 is a deficient number, since it is larger than the sum of its proper divisors (81356807).

406142305 is a wasteful number, since it uses less digits than its factorization.

406142305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21395.

The product of its (nonzero) digits is 2880, while the sum is 25.

The square root of 406142305 is about 20152.9726095184. The cubic root of 406142305 is about 740.5585659817.

Adding to 406142305 its reverse (503241604), we get a palindrome (909383909).

The spelling of 406142305 in words is "four hundred six million, one hundred forty-two thousand, three hundred five".