1431409 has 4 divisors (see below), whose sum is σ = 1635904. Its totient is φ = 1226916.

The previous prime is 1431389. The next prime is 1431413. The reversal of 1431409 is 9041341.

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.

It is a cyclic number.

It is not a de Polignac number, because 1431409 - 2⁵ = 1431377 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1431409.

It is not an unprimeable number, because it can be changed into a prime (1431439) 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, 102237 + ... + 102250.

It is an arithmetic number, because the mean of its divisors is an integer number (408976).

2^1431409 is an apocalyptic number.

It is an amenable number.

1431409 is a deficient number, since it is larger than the sum of its proper divisors (204495).

1431409 is an equidigital number, since it uses as much as digits as its factorization.

1431409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204494.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 1431409 is about 1196.4150617574. The cubic root of 1431409 is about 112.6993075989.

The spelling of 1431409 in words is "one million, four hundred thirty-one thousand, four hundred nine".