1321439 has 8 divisors (see below), whose sum is σ = 1517568. Its totient is φ = 1127160.

The previous prime is 1321429. The next prime is 1321447. The reversal of 1321439 is 9341231.

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

It is a cyclic number.

It is not a de Polignac number, because 1321439 - 2²⁰ = 272863 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1874 + ... + 2480.

It is an arithmetic number, because the mean of its divisors is an integer number (189696).

2^1321439 is an apocalyptic number.

1321439 is a deficient number, since it is larger than the sum of its proper divisors (196129).

1321439 is an equidigital number, since it uses as much as digits as its factorization.

1321439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925.

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

The square root of 1321439 is about 1149.5386030926. The cubic root of 1321439 is about 109.7359783734.

The spelling of 1321439 in words is "one million, three hundred twenty-one thousand, four hundred thirty-nine".