405941 has 4 divisors (see below), whose sum is σ = 415884. Its totient is φ = 396000.

The previous prime is 405917. The next prime is 405947. The reversal of 405941 is 149504.

It is a happy number.

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 207025 + 198916 = 455^2 + 446^2 .

It is a cyclic number.

It is not a de Polignac number, because 405941 - 2¹⁸ = 143797 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 (405947) 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, 4910 + ... + 4991.

It is an arithmetic number, because the mean of its divisors is an integer number (103971).

2⁴⁰⁵⁹⁴¹ is an apocalyptic number.

405941 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

405941 is a deficient number, since it is larger than the sum of its proper divisors (9943).

405941 is an equidigital number, since it uses as much as digits as its factorization.

405941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9942.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 405941 is about 637.1349935453. The cubic root of 405941 is about 74.0436192799.

The spelling of 405941 in words is "four hundred five thousand, nine hundred forty-one".