1121636 has 6 divisors (see below), whose sum is σ = 1962870. Its totient is φ = 560816.

The previous prime is 1121629. The next prime is 1121651. The reversal of 1121636 is 6361211.

It can be written as a sum of positive squares in only one way, i.e., 640000 + 481636 = 800^2 + 694^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140201 + ... + 140208.

It is an arithmetic number, because the mean of its divisors is an integer number (327145).

2^1121636 is an apocalyptic number.

It is an amenable number.

1121636 is a deficient number, since it is larger than the sum of its proper divisors (841234).

1121636 is a wasteful number, since it uses less digits than its factorization.

1121636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280413 (or 280411 counting only the distinct ones).

The product of its digits is 216, while the sum is 20.

The square root of 1121636 is about 1059.0731797189. The cubic root of 1121636 is about 103.9004224387.

Adding to 1121636 its reverse (6361211), we get a palindrome (7482847).

The spelling of 1121636 in words is "one million, one hundred twenty-one thousand, six hundred thirty-six".