1131633 has 6 divisors (see below), whose sum is σ = 1634594. Its totient is φ = 754416.

The previous prime is 1131629. The next prime is 1131643. The reversal of 1131633 is 3361311.

1131633 is a `hidden beast` number, since 1 + 1 + 31 + 633 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1034289 + 97344 = 1017^2 + 312^2 .

It is not a de Polignac number, because 1131633 - 2² = 1131629 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131643) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 62860 + ... + 62877.

2^1131633 is an apocalyptic number.

It is an amenable number.

1131633 is a deficient number, since it is larger than the sum of its proper divisors (502961).

1131633 is a wasteful number, since it uses less digits than its factorization.

1131633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125743 (or 125740 counting only the distinct ones).

The product of its digits is 162, while the sum is 18.

The square root of 1131633 is about 1063.7824025617. The cubic root of 1131633 is about 104.2081936471.

Adding to 1131633 its reverse (3361311), we get a palindrome (4492944).

It can be divided in two parts, 1131 and 633, that added together give a square (1764 = 42²).

The spelling of 1131633 in words is "one million, one hundred thirty-one thousand, six hundred thirty-three".