1121508 has 18 divisors (see below), whose sum is σ = 2835014. Its totient is φ = 373824.

The previous prime is 1121453. The next prime is 1121509. The reversal of 1121508 is 8051211.

It can be written as a sum of positive squares in only one way, i.e., 842724 + 278784 = 918^2 + 528^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a hoax number, since the sum of its digits (18) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1121509) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15541 + ... + 15612.

2^1121508 is an apocalyptic number.

1121508 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1121508 is an abundant number, since it is smaller than the sum of its proper divisors (1713506).

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

1121508 is a wasteful number, since it uses less digits than its factorization.

1121508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31163 (or 31158 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 18.

The square root of 1121508 is about 1059.0127477986. The cubic root of 1121508 is about 103.8964699503.

Adding to 1121508 its reverse (8051211), we get a palindrome (9172719).

The spelling of 1121508 in words is "one million, one hundred twenty-one thousand, five hundred eight".