1329761 has 2 divisors, whose sum is σ = 1329762. Its totient is φ = 1329760.

The previous prime is 1329733. The next prime is 1329763. The reversal of 1329761 is 1679231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1308736 + 21025 = 1144^2 + 145^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1329761 is a prime.

Together with 1329763, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1329763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 664880 + 664881.

It is an arithmetic number, because the mean of its divisors is an integer number (664881).

2^1329761 is an apocalyptic number.

It is an amenable number.

1329761 is a deficient number, since it is larger than the sum of its proper divisors (1).

1329761 is an equidigital number, since it uses as much as digits as its factorization.

1329761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2268, while the sum is 29.

The square root of 1329761 is about 1153.1526351702. The cubic root of 1329761 is about 109.9658571721.

The spelling of 1329761 in words is "one million, three hundred twenty-nine thousand, seven hundred sixty-one".