1331636 has 12 divisors (see below), whose sum is σ = 2405760. Its totient is φ = 644280.

The previous prime is 1331633. The next prime is 1331641. The reversal of 1331636 is 6361331.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331633) 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, 5246 + ... + 5493.

It is an arithmetic number, because the mean of its divisors is an integer number (200480).

2^1331636 is an apocalyptic number.

It is an amenable number.

1331636 is a deficient number, since it is larger than the sum of its proper divisors (1074124).

1331636 is a wasteful number, since it uses less digits than its factorization.

1331636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10774 (or 10772 counting only the distinct ones).

The product of its digits is 972, while the sum is 23.

The square root of 1331636 is about 1153.9653374344. The cubic root of 1331636 is about 110.0175178712.

Adding to 1331636 its reverse (6361331), we get a palindrome (7692967).

The spelling of 1331636 in words is "one million, three hundred thirty-one thousand, six hundred thirty-six".