1329404 has 24 divisors (see below), whose sum is σ = 2451456. Its totient is φ = 630000.

The previous prime is 1329397. The next prime is 1329407. The reversal of 1329404 is 4049231.

It is a Smith number, since the sum of its digits (23) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1329404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1329407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8729 + ... + 8879.

It is an arithmetic number, because the mean of its divisors is an integer number (102144).

2^1329404 is an apocalyptic number.

It is an amenable number.

1329404 is a deficient number, since it is larger than the sum of its proper divisors (1122052).

1329404 is a wasteful number, since it uses less digits than its factorization.

1329404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1329404 is about 1152.9978317412. The cubic root of 1329404 is about 109.9560154726.

The spelling of 1329404 in words is "one million, three hundred twenty-nine thousand, four hundred four".