123052505 has 4 divisors (see below), whose sum is σ = 147663012. Its totient is φ = 98442000.

The previous prime is 123052469. The next prime is 123052513. The reversal of 123052505 is 505250321.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19175641 + 103876864 = 4379^2 + 10192^2 .

It is a de Polignac number, because none of the positive numbers 2^k-123052505 is a prime.

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

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12305246 + ... + 12305255.

It is an arithmetic number, because the mean of its divisors is an integer number (36915753).

Almost surely, 2^123052505 is an apocalyptic number.

It is an amenable number.

123052505 is a deficient number, since it is larger than the sum of its proper divisors (24610507).

123052505 is an equidigital number, since it uses as much as digits as its factorization.

123052505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24610506.

The product of its (nonzero) digits is 1500, while the sum is 23.

The square root of 123052505 is about 11092.9033620599. The cubic root of 123052505 is about 497.3897367650.

It can be divided in two parts, 1230 and 52505, that added together give a palindrome (53735).

The spelling of 123052505 in words is "one hundred twenty-three million, fifty-two thousand, five hundred five".