1125156643 has 16 divisors (see below), whose sum is σ = 1247369760. Its totient is φ = 1008170496.

The previous prime is 1125156623. The next prime is 1125156647. The reversal of 1125156643 is 3466515211.

It is a cyclic number.

It is not a de Polignac number, because 1125156643 - 2¹⁷ = 1125025571 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1125156599 and 1125156608.

It is not an unprimeable number, because it can be changed into a prime (1125156647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 222123 + ... + 227131.

It is an arithmetic number, because the mean of its divisors is an integer number (77960610).

Almost surely, 2^1125156643 is an apocalyptic number.

1125156643 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1125156643 is a deficient number, since it is larger than the sum of its proper divisors (122213117).

1125156643 is a wasteful number, since it uses less digits than its factorization.

1125156643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5526.

The product of its digits is 21600, while the sum is 34.

The square root of 1125156643 is about 33543.3546771935. The cubic root of 1125156643 is about 1040.0901804813.

The spelling of 1125156643 in words is "one billion, one hundred twenty-five million, one hundred fifty-six thousand, six hundred forty-three".