1329647 has 4 divisors (see below), whose sum is σ = 1450536. Its totient is φ = 1208760.

The previous prime is 1329637. The next prime is 1329661. The reversal of 1329647 is 7469231.

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 1329647 - 2⁴ = 1329631 is a prime.

It is a super-2 number, since 2×1329647² = 3535922289218, which contains 22 as substring.

It is a Duffinian 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 (1329637) 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, 60428 + ... + 60449.

It is an arithmetic number, because the mean of its divisors is an integer number (362634).

2^1329647 is an apocalyptic number.

1329647 is a deficient number, since it is larger than the sum of its proper divisors (120889).

1329647 is a wasteful number, since it uses less digits than its factorization.

1329647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120888.

The product of its digits is 9072, while the sum is 32.

The square root of 1329647 is about 1153.1032044011. The cubic root of 1329647 is about 109.9627146360.

It can be divided in two parts, 132 and 9647, that added together give a palindrome (9779).

The spelling of 1329647 in words is "one million, three hundred twenty-nine thousand, six hundred forty-seven".