1161530 has 16 divisors (see below), whose sum is σ = 2142504. Its totient is φ = 453120.

The previous prime is 1161529. The next prime is 1161547. The reversal of 1161530 is 351611.

It can be written as a sum of positive squares in 4 ways, for example, as 564001 + 597529 = 751^2 + 773^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1161499 and 1161508.

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 7 ways as a sum of consecutive naturals, for example, 1007 + ... + 1826.

2^1161530 is an apocalyptic number.

1161530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1161530 is a deficient number, since it is larger than the sum of its proper divisors (980974).

1161530 is a wasteful number, since it uses less digits than its factorization.

1161530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2881.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 1161530 is about 1077.7430120395. The cubic root of 1161530 is about 105.1179324963.

The spelling of 1161530 in words is "one million, one hundred sixty-one thousand, five hundred thirty".