1121408 has 16 divisors (see below), whose sum is σ = 2234310. Its totient is φ = 560640.

The previous prime is 1121389. The next prime is 1121423. The reversal of 1121408 is 8041211.

It can be written as a sum of positive squares in only one way, i.e., 1098304 + 23104 = 1048^2 + 152^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4253 + ... + 4508.

2^1121408 is an apocalyptic number.

It is an amenable number.

1121408 is a deficient number, since it is larger than the sum of its proper divisors (1112902).

1121408 is an frugal number, since it uses more digits than its factorization.

1121408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8775 (or 8763 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 17.

The square root of 1121408 is about 1058.9655329613. The cubic root of 1121408 is about 103.8933818594.

Adding to 1121408 its reverse (8041211), we get a palindrome (9162619).

The spelling of 1121408 in words is "one million, one hundred twenty-one thousand, four hundred eight".