1155330 has 64 divisors (see below), whose sum is σ = 3369600. Its totient is φ = 279360.

The previous prime is 1155317. The next prime is 1155373. The reversal of 1155330 is 335511.

Added to its reverse (335511) it gives a square (1490841 = 1221²).

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2776 + ... + 3164.

It is an arithmetic number, because the mean of its divisors is an integer number (52650).

2^1155330 is an apocalyptic number.

1155330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1155330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1684800).

1155330 is an abundant number, since it is smaller than the sum of its proper divisors (2214270).

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

1155330 is a wasteful number, since it uses less digits than its factorization.

1155330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416 (or 410 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 18.

The square root of 1155330 is about 1074.8627819401. The cubic root of 1155330 is about 104.9305663404.

Adding to 1155330 its reverse (335511), we get a square (1490841 = 1221²).

It can be divided in two parts, 1155 and 330, that added together give a triangular number (1485 = T₅₄).

The spelling of 1155330 in words is "one million, one hundred fifty-five thousand, three hundred thirty".