408161 has 4 divisors (see below), whose sum is σ = 439572. Its totient is φ = 376752.

The previous prime is 408137. The next prime is 408169. The reversal of 408161 is 161804.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 112225 + 295936 = 335^2 + 544^2 .

It is a cyclic number.

It is not a de Polignac number, because 408161 - 2¹⁰ = 407137 is a prime.

It is a Duffinian number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 408161.

It is not an unprimeable number, because it can be changed into a prime (408169) 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, 15686 + ... + 15711.

It is an arithmetic number, because the mean of its divisors is an integer number (109893).

2⁴⁰⁸¹⁶¹ is an apocalyptic number.

It is an amenable number.

408161 is a deficient number, since it is larger than the sum of its proper divisors (31411).

408161 is a wasteful number, since it uses less digits than its factorization.

408161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31410.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 408161 is about 638.8747921150. The cubic root of 408161 is about 74.1783499388.

Adding to 408161 its reverse (161804), we get a palindrome (569965).

The spelling of 408161 in words is "four hundred eight thousand, one hundred sixty-one".