1181530 has 16 divisors (see below), whose sum is σ = 2430720. Its totient is φ = 405072.

The previous prime is 1181527. The next prime is 1181549. The reversal of 1181530 is 351811.

1181530 = 13² + 14² + ... + 152².

It is a junction number, because it is equal to n+sod(n) for n = 1181498 and 1181507.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8370 + ... + 8509.

It is an arithmetic number, because the mean of its divisors is an integer number (151920).

2^1181530 is an apocalyptic number.

1181530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1181530 is an abundant number, since it is smaller than the sum of its proper divisors (1249190).

1181530 is a wasteful number, since it uses less digits than its factorization.

1181530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16893.

The product of its (nonzero) digits is 120, while the sum is 19.

The square root of 1181530 is about 1086.9820605695. The cubic root of 1181530 is about 105.7178326752.

It can be divided in two parts, 1181 and 530, that added together give a triangular number (1711 = T₅₈).

The spelling of 1181530 in words is "one million, one hundred eighty-one thousand, five hundred thirty".