1121878045 has 4 divisors (see below), whose sum is σ = 1346253660. Its totient is φ = 897502432.

The previous prime is 1121878033. The next prime is 1121878057. The reversal of 1121878045 is 5408781211.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1121878033) and next prime (1121878057).

It can be written as a sum of positive squares in 2 ways, for example, as 242518329 + 879359716 = 15573^2 + 29654^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121878045 - 2⁵ = 1121878013 is a prime.

It is a super-2 number, since 2×1121878045² = 2517220695706044050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1121877995 and 1121878013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112187800 + ... + 112187809.

It is an arithmetic number, because the mean of its divisors is an integer number (336563415).

Almost surely, 2^1121878045 is an apocalyptic number.

It is an amenable number.

1121878045 is a deficient number, since it is larger than the sum of its proper divisors (224375615).

1121878045 is an equidigital number, since it uses as much as digits as its factorization.

1121878045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224375614.

The product of its (nonzero) digits is 17920, while the sum is 37.

The square root of 1121878045 is about 33494.4479727611. The cubic root of 1121878045 is about 1039.0789567989.

The spelling of 1121878045 in words is "one billion, one hundred twenty-one million, eight hundred seventy-eight thousand, forty-five".