1220533 has 8 divisors (see below), whose sum is σ = 1258560. Its totient is φ = 1183200.

The previous prime is 1220507. The next prime is 1220591. The reversal of 1220533 is 3350221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1220533 - 2¹⁷ = 1089461 is a prime.

It is an Ulam 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 (1220333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8008 + ... + 8158.

It is an arithmetic number, because the mean of its divisors is an integer number (157320).

2^1220533 is an apocalyptic number.

It is an amenable number.

1220533 is a deficient number, since it is larger than the sum of its proper divisors (38027).

1220533 is a wasteful number, since it uses less digits than its factorization.

1220533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347.

The product of its (nonzero) digits is 180, while the sum is 16.

The square root of 1220533 is about 1104.7773531350. Note that the first 3 decimals coincide. The cubic root of 1220533 is about 106.8685315785.

Adding to 1220533 its reverse (3350221), we get a palindrome (4570754).

The spelling of 1220533 in words is "one million, two hundred twenty thousand, five hundred thirty-three".