1329961 has 4 divisors (see below), whose sum is σ = 1408212. Its totient is φ = 1251712.

The previous prime is 1329953. The next prime is 1329971. The reversal of 1329961 is 1699231.

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

It can be written as a sum of positive squares in 2 ways, for example, as 416025 + 913936 = 645^2 + 956^2 .

It is a cyclic number.

It is not a de Polignac number, because 1329961 - 2³ = 1329953 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1329941) 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, 39100 + ... + 39133.

It is an arithmetic number, because the mean of its divisors is an integer number (352053).

2^1329961 is an apocalyptic number.

It is an amenable number.

1329961 is a deficient number, since it is larger than the sum of its proper divisors (78251).

1329961 is an equidigital number, since it uses as much as digits as its factorization.

1329961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78250.

The product of its digits is 2916, while the sum is 31.

The square root of 1329961 is about 1153.2393506987. The cubic root of 1329961 is about 109.9713699595.

The spelling of 1329961 in words is "one million, three hundred twenty-nine thousand, nine hundred sixty-one".