1121555275 has 24 divisors (see below), whose sum is σ = 1477673280. Its totient is φ = 842038560.

The previous prime is 1121555261. The next prime is 1121555291. The reversal of 1121555275 is 5725551211.

It is not a de Polignac number, because 1121555275 - 2⁵ = 1121555243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1121555275.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39792 + ... + 61858.

It is an arithmetic number, because the mean of its divisors is an integer number (61569720).

Almost surely, 2^1121555275 is an apocalyptic number.

1121555275 is a deficient number, since it is larger than the sum of its proper divisors (356118005).

1121555275 is a wasteful number, since it uses less digits than its factorization.

1121555275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22203 (or 22198 counting only the distinct ones).

The product of its digits is 17500, while the sum is 34.

The square root of 1121555275 is about 33489.6293649243. The cubic root of 1121555275 is about 1038.9792978133.

The spelling of 1121555275 in words is "one billion, one hundred twenty-one million, five hundred fifty-five thousand, two hundred seventy-five".