11661530 has 8 divisors (see below), whose sum is σ = 20990772. Its totient is φ = 4664608.

The previous prime is 11661523. The next prime is 11661547. The reversal of 11661530 is 3516611.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10582009 + 1079521 = 3253^2 + 1039^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 11661496 and 11661505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 583067 + ... + 583086.

Almost surely, 2^11661530 is an apocalyptic number.

11661530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11661530 is a deficient number, since it is larger than the sum of its proper divisors (9329242).

11661530 is a wasteful number, since it uses less digits than its factorization.

11661530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166160.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 11661530 is about 3414.8982415293. The cubic root of 11661530 is about 226.7697795948.

The spelling of 11661530 in words is "eleven million, six hundred sixty-one thousand, five hundred thirty".