1215733 has 4 divisors (see below), whose sum is σ = 1232928. Its totient is φ = 1198540.

The previous prime is 1215719. The next prime is 1215743. The reversal of 1215733 is 3375121.

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.

It is a cyclic number.

It is not a de Polignac number, because 1215733 - 2¹⁷ = 1084661 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8491 + ... + 8632.

It is an arithmetic number, because the mean of its divisors is an integer number (308232).

2^1215733 is an apocalyptic number.

It is an amenable number.

1215733 is a deficient number, since it is larger than the sum of its proper divisors (17195).

1215733 is an equidigital number, since it uses as much as digits as its factorization.

1215733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17194.

The product of its digits is 630, while the sum is 22.

The square root of 1215733 is about 1102.6028296717. The cubic root of 1215733 is about 106.7282532801.

The spelling of 1215733 in words is "one million, two hundred fifteen thousand, seven hundred thirty-three".