1101631 has 8 divisors (see below), whose sum is σ = 1160064. Its totient is φ = 1044120.

The previous prime is 1101619. The next prime is 1101641. The reversal of 1101631 is 1361011.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1101631 is a prime.

It is a super-2 number, since 2×1101631² = 2427181720322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1101641) 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, 4740 + ... + 4966.

It is an arithmetic number, because the mean of its divisors is an integer number (145008).

2^1101631 is an apocalyptic number.

1101631 is a deficient number, since it is larger than the sum of its proper divisors (58433).

1101631 is a wasteful number, since it uses less digits than its factorization.

1101631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1101631 is about 1049.5861089020. The cubic root of 1101631 is about 103.2790060130.

Adding to 1101631 its reverse (1361011), we get a palindrome (2462642).

The spelling of 1101631 in words is "one million, one hundred one thousand, six hundred thirty-one".