1320633 has 12 divisors (see below), whose sum is σ = 2008240. Its totient is φ = 833976.

The previous prime is 1320623. The next prime is 1320667. The reversal of 1320633 is 3360231.

It is a happy number.

1320633 is a `hidden beast` number, since 1 + 32 + 0 + 633 = 666.

It is not a de Polignac number, because 1320633 - 2⁴ = 1320617 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1320623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3691 + ... + 4032.

2^1320633 is an apocalyptic number.

It is an amenable number.

1320633 is a deficient number, since it is larger than the sum of its proper divisors (687607).

1320633 is a wasteful number, since it uses less digits than its factorization.

1320633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7748 (or 7745 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 1320633 is about 1149.1879741800. The cubic root of 1320633 is about 109.7136630068.

Adding to 1320633 its reverse (3360231), we get a palindrome (4680864).

It can be divided in two parts, 1320 and 633, that added together give a triangular number (1953 = T₆₂).

The spelling of 1320633 in words is "one million, three hundred twenty thousand, six hundred thirty-three".