1121697528 has 128 divisors (see below), whose sum is σ = 3401318400. Its totient is φ = 301117824.

The previous prime is 1121697503. The next prime is 1121697589. The reversal of 1121697528 is 8257961211.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 1121697528.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 404001 + ... + 406767.

It is an arithmetic number, because the mean of its divisors is an integer number (26572800).

Almost surely, 2^1121697528 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 1121697528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1700659200).

1121697528 is an abundant number, since it is smaller than the sum of its proper divisors (2279620872).

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

1121697528 is a wasteful number, since it uses less digits than its factorization.

1121697528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2929 (or 2925 counting only the distinct ones).

The product of its digits is 60480, while the sum is 42.

The square root of 1121697528 is about 33491.7531341672. The cubic root of 1121697528 is about 1039.0232224351.

The spelling of 1121697528 in words is "one billion, one hundred twenty-one million, six hundred ninety-seven thousand, five hundred twenty-eight".