123530665 has 8 divisors (see below), whose sum is σ = 149902920. Its totient is φ = 97713792.

The previous prime is 123530621. The next prime is 123530669. The reversal of 123530665 is 566035321.

It can be written as a sum of positive squares in 4 ways, for example, as 5851561 + 117679104 = 2419^2 + 10848^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 123530665 - 2¹¹ = 123528617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123530669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138354 + ... + 139243.

It is an arithmetic number, because the mean of its divisors is an integer number (18737865).

Almost surely, 2^123530665 is an apocalyptic number.

It is an amenable number.

123530665 is a deficient number, since it is larger than the sum of its proper divisors (26372255).

123530665 is an equidigital number, since it uses as much as digits as its factorization.

123530665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277691.

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 123530665 is about 11114.4349833898. The cubic root of 123530665 is about 498.0331598915.

Adding to 123530665 its reverse (566035321), we get a palindrome (689565986).

The spelling of 123530665 in words is "one hundred twenty-three million, five hundred thirty thousand, six hundred sixty-five".