1333729 has 4 divisors (see below), whose sum is σ = 1341360. Its totient is φ = 1326100.

The previous prime is 1333723. The next prime is 1333733. The reversal of 1333729 is 9273331.

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 an emirpimes, since its reverse is a distinct semiprime: 9273331 = 257 ⋅36083.

It is a cyclic number.

It is not a de Polignac number, because 1333729 - 2³ = 1333721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1333697 and 1333706.

It is not an unprimeable number, because it can be changed into a prime (1333721) 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, 3547 + ... + 3904.

It is an arithmetic number, because the mean of its divisors is an integer number (335340).

2^1333729 is an apocalyptic number.

It is an amenable number.

1333729 is a deficient number, since it is larger than the sum of its proper divisors (7631).

1333729 is an equidigital number, since it uses as much as digits as its factorization.

1333729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7630.

The product of its digits is 3402, while the sum is 28.

The square root of 1333729 is about 1154.8718543631. The cubic root of 1333729 is about 110.0751277410.

It can be divided in two parts, 13337 and 29, that added together give a triangular number (13366 = T₁₆₃).

The spelling of 1333729 in words is "one million, three hundred thirty-three thousand, seven hundred twenty-nine".