1123127845 has 16 divisors (see below), whose sum is σ = 1552053888. Its totient is φ = 764262720.

The previous prime is 1123127843. The next prime is 1123127857. The reversal of 1123127845 is 5487213211.

It is not a de Polignac number, because 1123127845 - 2¹ = 1123127843 is a prime.

It is a super-2 number, since 2×1123127845² = 2522832312428688050, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1123127845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123127843) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 117894 + ... + 127063.

It is an arithmetic number, because the mean of its divisors is an integer number (97003368).

Almost surely, 2^1123127845 is an apocalyptic number.

It is an amenable number.

1123127845 is a deficient number, since it is larger than the sum of its proper divisors (428926043).

1123127845 is a wasteful number, since it uses less digits than its factorization.

1123127845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245100.

The product of its digits is 13440, while the sum is 34.

The square root of 1123127845 is about 33513.0996029911. The cubic root of 1123127845 is about 1039.4646668574.

The spelling of 1123127845 in words is "one billion, one hundred twenty-three million, one hundred twenty-seven thousand, eight hundred forty-five".