1123127655 has 16 divisors (see below), whose sum is σ = 1935235680. Its totient is φ = 552924288.

The previous prime is 1123127653. The next prime is 1123127657. The reversal of 1123127655 is 5567213211.

It is an interprime number because it is at equal distance from previous prime (1123127653) and next prime (1123127657).

It is not a de Polignac number, because 1123127655 - 2¹ = 1123127653 is a prime.

It is a super-2 number, since 2×1123127655² = 2522831458851598050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123127653) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2879620 + ... + 2880009.

It is an arithmetic number, because the mean of its divisors is an integer number (120952230).

Almost surely, 2^1123127655 is an apocalyptic number.

1123127655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1123127655 is a deficient number, since it is larger than the sum of its proper divisors (812108025).

1123127655 is a wasteful number, since it uses less digits than its factorization.

1123127655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5759650.

The product of its digits is 12600, while the sum is 33.

The square root of 1123127655 is about 33513.0967682785. The cubic root of 1123127655 is about 1039.4646082418.

It can be divided in two parts, 1123 and 127655, that added together give a triangular number (128778 = T₅₀₇).

The spelling of 1123127655 in words is "one billion, one hundred twenty-three million, one hundred twenty-seven thousand, six hundred fifty-five".