1128158249 has 4 divisors (see below), whose sum is σ = 1152161664. Its totient is φ = 1104154836.

The previous prime is 1128158243. The next prime is 1128158281. The reversal of 1128158249 is 9428518211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1128158249 is a prime.

It is a Duffinian number.

1128158249 is a modest number, since divided by 158249 gives 1128 as remainder.

It is not an unprimeable number, because it can be changed into a prime (1128158243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12001637 + ... + 12001730.

It is an arithmetic number, because the mean of its divisors is an integer number (288040416).

Almost surely, 2^1128158249 is an apocalyptic number.

It is an amenable number.

1128158249 is a deficient number, since it is larger than the sum of its proper divisors (24003415).

1128158249 is an equidigital number, since it uses as much as digits as its factorization.

1128158249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24003414.

The product of its digits is 46080, while the sum is 41.

The square root of 1128158249 is about 33588.0670625745. The cubic root of 1128158249 is about 1041.0142500009.

The spelling of 1128158249 in words is "one billion, one hundred twenty-eight million, one hundred fifty-eight thousand, two hundred forty-nine".