1205406 has 24 divisors (see below), whose sum is σ = 2633904. Its totient is φ = 398400.

The previous prime is 1205387. The next prime is 1205411. The reversal of 1205406 is 6045021.

It is a happy number.

1205406 is a `hidden beast` number, since 120 + 540 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2806 + ... + 3206.

It is an arithmetic number, because the mean of its divisors is an integer number (109746).

2^1205406 is an apocalyptic number.

1205406 is an abundant number, since it is smaller than the sum of its proper divisors (1428498).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1205406 is a wasteful number, since it uses less digits than its factorization.

1205406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576 (or 573 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 1205406 is about 1097.9098323633. The cubic root of 1205406 is about 106.4251937815.

The spelling of 1205406 in words is "one million, two hundred five thousand, four hundred six".