1309406 has 8 divisors (see below), whose sum is σ = 2244720. Its totient is φ = 561168.

The previous prime is 1309397. The next prime is 1309411. The reversal of 1309406 is 6049031.

It is a sphenic number, since it is the product of 3 distinct primes.

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 3 ways as a sum of consecutive naturals, for example, 46751 + ... + 46778.

It is an arithmetic number, because the mean of its divisors is an integer number (280590).

2^1309406 is an apocalyptic number.

1309406 is a deficient number, since it is larger than the sum of its proper divisors (935314).

1309406 is an equidigital number, since it uses as much as digits as its factorization.

1309406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93538.

The product of its (nonzero) digits is 648, while the sum is 23.

The square root of 1309406 is about 1144.2927946990. The cubic root of 1309406 is about 109.4018775851.

The spelling of 1309406 in words is "one million, three hundred nine thousand, four hundred six".