1121656 has 8 divisors (see below), whose sum is σ = 2103120. Its totient is φ = 560824.

The previous prime is 1121651. The next prime is 1121671. The reversal of 1121656 is 6561211.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1121656² = 2516224364672, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70096 + ... + 70111.

It is an arithmetic number, because the mean of its divisors is an integer number (262890).

2^1121656 is an apocalyptic number.

It is an amenable number.

1121656 is a deficient number, since it is larger than the sum of its proper divisors (981464).

1121656 is a wasteful number, since it uses less digits than its factorization.

1121656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140213 (or 140209 counting only the distinct ones).

The product of its digits is 360, while the sum is 22.

The square root of 1121656 is about 1059.0826218950. The cubic root of 1121656 is about 103.9010399879.

Adding to 1121656 its reverse (6561211), we get a palindrome (7682867).

The spelling of 1121656 in words is "one million, one hundred twenty-one thousand, six hundred fifty-six".