123642265 has 8 divisors (see below), whose sum is σ = 151989768. Its totient is φ = 96501120.

The previous prime is 123642251. The next prime is 123642287. The reversal of 123642265 is 562246321.

It can be written as a sum of positive squares in 4 ways, for example, as 3345241 + 120297024 = 1829^2 + 10968^2 .

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

It is not a de Polignac number, because 123642265 - 2¹¹ = 123640217 is a prime.

It is a Duffinian 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, 301362 + ... + 301771.

It is an arithmetic number, because the mean of its divisors is an integer number (18998721).

Almost surely, 2^123642265 is an apocalyptic number.

It is an amenable number.

123642265 is a deficient number, since it is larger than the sum of its proper divisors (28347503).

123642265 is an equidigital number, since it uses as much as digits as its factorization.

123642265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603179.

The product of its digits is 17280, while the sum is 31.

The square root of 123642265 is about 11119.4543481234. The cubic root of 123642265 is about 498.1830923571.

Adding to 123642265 its reverse (562246321), we get a palindrome (685888586).

The spelling of 123642265 in words is "one hundred twenty-three million, six hundred forty-two thousand, two hundred sixty-five".