1329121 has 4 divisors (see below), whose sum is σ = 1336000. Its totient is φ = 1322244.

The previous prime is 1329109. The next prime is 1329127. The reversal of 1329121 is 1219231.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1219231 = 13 ⋅93787.

It is a cyclic number.

It is not a de Polignac number, because 1329121 - 2¹³ = 1320929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1329127) 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, 3141 + ... + 3538.

It is an arithmetic number, because the mean of its divisors is an integer number (334000).

2^1329121 is an apocalyptic number.

It is an amenable number.

1329121 is a deficient number, since it is larger than the sum of its proper divisors (6879).

1329121 is an equidigital number, since it uses as much as digits as its factorization.

1329121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6878.

The product of its digits is 108, while the sum is 19.

The square root of 1329121 is about 1152.8751016480. The cubic root of 1329121 is about 109.9482125371.

The spelling of 1329121 in words is "one million, three hundred twenty-nine thousand, one hundred twenty-one".