1329994 has 4 divisors (see below), whose sum is σ = 1994994. Its totient is φ = 664996.

The previous prime is 1329971. The next prime is 1330001. The reversal of 1329994 is 4999231.

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

It can be written as a sum of positive squares in only one way, i.e., 744769 + 585225 = 863^2 + 765^2 .

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 332497 + ... + 332500.

2^1329994 is an apocalyptic number.

1329994 is a deficient number, since it is larger than the sum of its proper divisors (665000).

1329994 is an equidigital number, since it uses as much as digits as its factorization.

1329994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664999.

The product of its digits is 17496, while the sum is 37.

The square root of 1329994 is about 1153.2536581342. The cubic root of 1329994 is about 109.9722795163.

It can be divided in two parts, 132999 and 4, that multiplied together give a triangular number (531996 = T₁₀₃₁).

The spelling of 1329994 in words is "one million, three hundred twenty-nine thousand, nine hundred ninety-four".