1231633 has 8 divisors (see below), whose sum is σ = 1404648. Its totient is φ = 1069824.

The previous prime is 1231631. The next prime is 1231663. The reversal of 1231633 is 3361321.

It can be written as a sum of positive squares in 4 ways, for example, as 3969 + 1227664 = 63^2 + 1108^2 .

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 1231633 - 2¹ = 1231631 is a prime.

It is a Duffinian number.

1231633 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1231633.

It is not an unprimeable number, because it can be changed into a prime (1231631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2566 + ... + 3007.

It is an arithmetic number, because the mean of its divisors is an integer number (175581).

2^1231633 is an apocalyptic number.

1231633 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1231633 is a deficient number, since it is larger than the sum of its proper divisors (173015).

1231633 is a wasteful number, since it uses less digits than its factorization.

1231633 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5603.

The product of its digits is 324, while the sum is 19.

The square root of 1231633 is about 1109.7896197028. The cubic root of 1231633 is about 107.1915223581.

Adding to 1231633 its reverse (3361321), we get a palindrome (4592954).

The spelling of 1231633 in words is "one million, two hundred thirty-one thousand, six hundred thirty-three".