1158280123 has 64 divisors (see below), whose sum is σ = 1601639424. Its totient is φ = 815443200.

The previous prime is 1158280117. The next prime is 1158280127. The reversal of 1158280123 is 3210828511.

It is a de Polignac number, because none of the positive numbers 2^k-1158280123 is a prime.

It is a super-2 number, since 2×1158280123² = 2683225686673790258, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1158280127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 8841768 + ... + 8841898.

It is an arithmetic number, because the mean of its divisors is an integer number (25025616).

Almost surely, 2^1158280123 is an apocalyptic number.

1158280123 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1158280123 is a deficient number, since it is larger than the sum of its proper divisors (443359301).

1158280123 is a wasteful number, since it uses less digits than its factorization.

1158280123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257 (or 235 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 31.

The square root of 1158280123 is about 34033.5147024224. The cubic root of 1158280123 is about 1050.1980346051.

The spelling of 1158280123 in words is "one billion, one hundred fifty-eight million, two hundred eighty thousand, one hundred twenty-three".