1306406 has 4 divisors (see below), whose sum is σ = 1959612. Its totient is φ = 653202.

The previous prime is 1306391. The next prime is 1306411. The reversal of 1306406 is 6046031.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 326600 + ... + 326603.

It is an arithmetic number, because the mean of its divisors is an integer number (489903).

2^1306406 is an apocalyptic number.

1306406 is a deficient number, since it is larger than the sum of its proper divisors (653206).

1306406 is an equidigital number, since it uses as much as digits as its factorization.

1306406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653205.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 1306406 is about 1142.9811896965. The cubic root of 1306406 is about 109.3182629271.

The spelling of 1306406 in words is "one million, three hundred six thousand, four hundred six".