1372909 has 4 divisors (see below), whose sum is σ = 1375516. Its totient is φ = 1370304.

The previous prime is 1372879. The next prime is 1372913. The reversal of 1372909 is 9092731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9092731 = 503 ⋅18077.

It can be written as a sum of positive squares in 2 ways, for example, as 697225 + 675684 = 835^2 + 822^2 .

It is a cyclic number.

It is not a de Polignac number, because 1372909 - 2¹¹ = 1370861 is a prime.

It is a Duffinian number.

1372909 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1372979) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 204 + ... + 1669.

It is an arithmetic number, because the mean of its divisors is an integer number (343879).

2^1372909 is an apocalyptic number.

It is an amenable number.

1372909 is a deficient number, since it is larger than the sum of its proper divisors (2607).

1372909 is an equidigital number, since it uses as much as digits as its factorization.

1372909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2606.

The product of its (nonzero) digits is 3402, while the sum is 31.

The square root of 1372909 is about 1171.7119953299. The cubic root of 1372909 is about 111.1426081447.

The spelling of 1372909 in words is "one million, three hundred seventy-two thousand, nine hundred nine".