123630565 has 8 divisors (see below), whose sum is σ = 149826168. Its totient is φ = 97924800.

The previous prime is 123630553. The next prime is 123630583. The reversal of 123630565 is 565036321.

It can be written as a sum of positive squares in 4 ways, for example, as 78552769 + 45077796 = 8863^2 + 6714^2 .

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

It is not a de Polignac number, because 123630565 - 2⁹ = 123630053 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a congruent number.

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, 121902 + ... + 122911.

It is an arithmetic number, because the mean of its divisors is an integer number (18728271).

Almost surely, 2^123630565 is an apocalyptic number.

It is an amenable number.

123630565 is a deficient number, since it is larger than the sum of its proper divisors (26195603).

123630565 is a wasteful number, since it uses less digits than its factorization.

123630565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244919.

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

The square root of 123630565 is about 11118.9282307244. The cubic root of 123630565 is about 498.1673778654.

Adding to 123630565 its reverse (565036321), we get a palindrome (688666886).

The spelling of 123630565 in words is "one hundred twenty-three million, six hundred thirty thousand, five hundred sixty-five".