1121388 has 48 divisors (see below), whose sum is σ = 2903040. Its totient is φ = 335104.

The previous prime is 1121387. The next prime is 1121389. The reversal of 1121388 is 8831211.

It is an interprime number because it is at equal distance from previous prime (1121387) and next prime (1121389).

It is a super-2 number, since 2×1121388² = 2515022093088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1121383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4573 + ... + 4811.

It is an arithmetic number, because the mean of its divisors is an integer number (60480).

2^1121388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1121388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1451520).

1121388 is an abundant number, since it is smaller than the sum of its proper divisors (1781652).

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

1121388 is a wasteful number, since it uses less digits than its factorization.

1121388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286 (or 284 counting only the distinct ones).

The product of its digits is 384, while the sum is 24.

The square root of 1121388 is about 1058.9560897412. The cubic root of 1121388 is about 103.8927642192.

Adding to 1121388 its reverse (8831211), we get a palindrome (9952599).

The spelling of 1121388 in words is "one million, one hundred twenty-one thousand, three hundred eighty-eight".