1329401 has 4 divisors (see below), whose sum is σ = 1331712. Its totient is φ = 1327092.

The previous prime is 1329397. The next prime is 1329407. The reversal of 1329401 is 1049231.

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 a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1329401 - 2² = 1329397 is a prime.

It is a Duffinian number.

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 3 ways as a sum of consecutive naturals, for example, 476 + ... + 1698.

It is an arithmetic number, because the mean of its divisors is an integer number (332928).

2^1329401 is an apocalyptic number.

It is an amenable number.

1329401 is a deficient number, since it is larger than the sum of its proper divisors (2311).

1329401 is a wasteful number, since it uses less digits than its factorization.

1329401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2310.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 1329401 is about 1152.9965307840. The cubic root of 1329401 is about 109.9559327617.

The spelling of 1329401 in words is "one million, three hundred twenty-nine thousand, four hundred one".