1155830 has 32 divisors (see below), whose sum is σ = 2376864. Its totient is φ = 400896.

The previous prime is 1155829. The next prime is 1155841. The reversal of 1155830 is 385511.

1155830 = 72² + 73² + ... + 156².

It is a junction number, because it is equal to n+sod(n) for n = 1155796 and 1155805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1949 + ... + 2471.

It is an arithmetic number, because the mean of its divisors is an integer number (74277).

2^1155830 is an apocalyptic number.

1155830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1155830 is an abundant number, since it is smaller than the sum of its proper divisors (1221034).

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

1155830 is a wasteful number, since it uses less digits than its factorization.

1155830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 560.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1155830 is about 1075.0953446090. The cubic root of 1155830 is about 104.9457013282.

The spelling of 1155830 in words is "one million, one hundred fifty-five thousand, eight hundred thirty".