1406909 has 4 divisors (see below), whose sum is σ = 1607904. Its totient is φ = 1205916.

The previous prime is 1406897. The next prime is 1406927. The reversal of 1406909 is 9096041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9096041 = 19 ⋅478739.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1406909 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1406939) 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, 100487 + ... + 100500.

It is an arithmetic number, because the mean of its divisors is an integer number (401976).

2^1406909 is an apocalyptic number.

It is an amenable number.

1406909 is a deficient number, since it is larger than the sum of its proper divisors (200995).

1406909 is an equidigital number, since it uses as much as digits as its factorization.

1406909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200994.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 1406909 is about 1186.1319488151. The cubic root of 1406909 is about 112.0526166463.

The spelling of 1406909 in words is "one million, four hundred six thousand, nine hundred nine".