1158128503 has 8 divisors (see below), whose sum is σ = 1354356608. Its totient is φ = 969595704.

The previous prime is 1158128497. The next prime is 1158128507. The reversal of 1158128503 is 3058218511.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1158128503 - 2²¹ = 1156031351 is a prime.

It is a super-2 number, since 2×1158128503² = 2682523258922042018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1158128507) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1923501 + ... + 1924102.

It is an arithmetic number, because the mean of its divisors is an integer number (169294576).

Almost surely, 2^1158128503 is an apocalyptic number.

1158128503 is a deficient number, since it is larger than the sum of its proper divisors (196228105).

1158128503 is an equidigital number, since it uses as much as digits as its factorization.

1158128503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3847653.

The product of its (nonzero) digits is 9600, while the sum is 34.

The square root of 1158128503 is about 34031.2871193553. The cubic root of 1158128503 is about 1050.1522086225.

The spelling of 1158128503 in words is "one billion, one hundred fifty-eight million, one hundred twenty-eight thousand, five hundred three".