409946 has 4 divisors (see below), whose sum is σ = 614922. Its totient is φ = 204972.

The previous prime is 409943. The next prime is 409951. The reversal of 409946 is 649904.

It is a happy number.

409946 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in only one way, i.e., 390625 + 19321 = 625^2 + 139^2 .

It is not an unprimeable number, because it can be changed into a prime (409943) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 102485 + ... + 102488.

2⁴⁰⁹⁹⁴⁶ is an apocalyptic number.

409946 is a deficient number, since it is larger than the sum of its proper divisors (204976).

409946 is a wasteful number, since it uses less digits than its factorization.

409946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204975.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 409946 is about 640.2702554391. The cubic root of 409946 is about 74.2863267771.

The spelling of 409946 in words is "four hundred nine thousand, nine hundred forty-six".