1129631 has 4 divisors (see below), whose sum is σ = 1137264. Its totient is φ = 1122000.

The previous prime is 1129619. The next prime is 1129643. The reversal of 1129631 is 1369211.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1369211 = 277 ⋅4943.

It is an interprime number because it is at equal distance from previous prime (1129619) and next prime (1129643).

It is a cyclic number.

It is not a de Polignac number, because 1129631 - 2¹⁸ = 867487 is a prime.

It is a super-2 number, since 2×1129631² = 2552132392322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1129597 and 1129606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1129831) 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, 3590 + ... + 3891.

It is an arithmetic number, because the mean of its divisors is an integer number (284316).

2^1129631 is an apocalyptic number.

1129631 is a deficient number, since it is larger than the sum of its proper divisors (7633).

1129631 is an equidigital number, since it uses as much as digits as its factorization.

1129631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7632.

The product of its digits is 324, while the sum is 23.

The square root of 1129631 is about 1062.8410041017. The cubic root of 1129631 is about 104.1467049394.

The spelling of 1129631 in words is "one million, one hundred twenty-nine thousand, six hundred thirty-one".