1339447 has 4 divisors (see below), whose sum is σ = 1418256. Its totient is φ = 1260640.

The previous prime is 1339433. The next prime is 1339463. The reversal of 1339447 is 7449331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1339447 - 2¹⁹ = 815159 is a prime.

It is a d-powerful number, because it can be written as 1 + 3⁸ + 3⁹ + 9² + 4⁹ + 4¹⁰ + 7⁴ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1339427) 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, 39379 + ... + 39412.

It is an arithmetic number, because the mean of its divisors is an integer number (354564).

2^1339447 is an apocalyptic number.

1339447 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1339447 is a deficient number, since it is larger than the sum of its proper divisors (78809).

1339447 is an equidigital number, since it uses as much as digits as its factorization.

1339447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78808.

The product of its digits is 9072, while the sum is 31.

The square root of 1339447 is about 1157.3448060107. The cubic root of 1339447 is about 110.2322091877.

The spelling of 1339447 in words is "one million, three hundred thirty-nine thousand, four hundred forty-seven".