1121556 has 12 divisors (see below), whose sum is σ = 2616992. Its totient is φ = 373848.

The previous prime is 1121543. The next prime is 1121557. The reversal of 1121556 is 6551211.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1121556² = 2515775722272, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121557) 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, 46720 + ... + 46743.

2^1121556 is an apocalyptic number.

It is an amenable number.

1121556 is an abundant number, since it is smaller than the sum of its proper divisors (1495436).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1121556 is a wasteful number, since it uses less digits than its factorization.

1121556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93470 (or 93468 counting only the distinct ones).

The product of its digits is 300, while the sum is 21.

The square root of 1121556 is about 1059.0354101729. The cubic root of 1121556 is about 103.8979521687.

Adding to 1121556 its reverse (6551211), we get a palindrome (7672767).

The spelling of 1121556 in words is "one million, one hundred twenty-one thousand, five hundred fifty-six".