1003158 has 32 divisors (see below), whose sum is σ = 2402400. Its totient is φ = 308448.

The previous prime is 1003141. The next prime is 1003193. The reversal of 1003158 is 8513001.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1003158.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13 + ... + 1416.

It is an arithmetic number, because the mean of its divisors is an integer number (75075).

2^1003158 is an apocalyptic number.

1003158 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1003158, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1201200).

1003158 is an abundant number, since it is smaller than the sum of its proper divisors (1399242).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1003158 is a wasteful number, since it uses less digits than its factorization.

1003158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1453 (or 1447 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 1003158 is about 1001.5777553440. The cubic root of 1003158 is about 100.1051560500.

Adding to 1003158 its reverse (8513001), we get a palindrome (9516159).

The spelling of 1003158 in words is "one million, three thousand, one hundred fifty-eight".