405061 has 4 divisors (see below), whose sum is σ = 426400. Its totient is φ = 383724.

The previous prime is 405049. The next prime is 405071. The reversal of 405061 is 160504.

405061 is an esthetic number in base 9, because in such base its adjacent digits differ by 1.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 405061 - 2⁵ = 405029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (405001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10641 + ... + 10678.

It is an arithmetic number, because the mean of its divisors is an integer number (106600).

2⁴⁰⁵⁰⁶¹ is an apocalyptic number.

It is an amenable number.

405061 is a deficient number, since it is larger than the sum of its proper divisors (21339).

405061 is a wasteful number, since it uses less digits than its factorization.

405061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21338.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 405061 is about 636.4440273897. Note that the first 3 decimals coincide. The cubic root of 405061 is about 73.9900765851.

Adding to 405061 its reverse (160504), we get a palindrome (565565).

The spelling of 405061 in words is "four hundred five thousand, sixty-one".