1155258 has 24 divisors (see below), whose sum is σ = 2696148. Its totient is φ = 355392.

The previous prime is 1155247. The next prime is 1155263. The reversal of 1155258 is 8525511.

It can be written as a sum of positive squares in 2 ways, for example, as 1096209 + 59049 = 1047^2 + 243^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2235 + ... + 2702.

2^1155258 is an apocalyptic number.

1155258 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1155258 is an abundant number, since it is smaller than the sum of its proper divisors (1540890).

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

1155258 is a wasteful number, since it uses less digits than its factorization.

1155258 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4958 (or 4955 counting only the distinct ones).

The product of its digits is 2000, while the sum is 27.

The square root of 1155258 is about 1074.8292887710. The cubic root of 1155258 is about 104.9283865425.

The spelling of 1155258 in words is "one million, one hundred fifty-five thousand, two hundred fifty-eight".