123021265 has 8 divisors (see below), whose sum is σ = 156309480. Its totient is φ = 92627712.

The previous prime is 123021253. The next prime is 123021271. The reversal of 123021265 is 562120321.

It can be written as a sum of positive squares in 4 ways, for example, as 69906321 + 53114944 = 8361^2 + 7288^2 .

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 123021265 - 2⁹ = 123020753 is a prime.

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, 723570 + ... + 723739.

It is an arithmetic number, because the mean of its divisors is an integer number (19538685).

Almost surely, 2^123021265 is an apocalyptic number.

It is an amenable number.

123021265 is a deficient number, since it is larger than the sum of its proper divisors (33288215).

123021265 is a wasteful number, since it uses less digits than its factorization.

123021265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1447331.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 123021265 is about 11091.4951652156. The cubic root of 123021265 is about 497.3476415350.

Adding to 123021265 its reverse (562120321), we get a palindrome (685141586).

The spelling of 123021265 in words is "one hundred twenty-three million, twenty-one thousand, two hundred sixty-five".