123253565 has 8 divisors (see below), whose sum is σ = 149930808. Its totient is φ = 97251840.

The previous prime is 123253561. The next prime is 123253597. The reversal of 123253565 is 565352321.

It can be written as a sum of positive squares in 4 ways, for example, as 39677401 + 83576164 = 6299^2 + 9142^2 .

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

It is not a de Polignac number, because 123253565 - 2² = 123253561 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123253561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168476 + ... + 169205.

It is an arithmetic number, because the mean of its divisors is an integer number (18741351).

Almost surely, 2^123253565 is an apocalyptic number.

It is an amenable number.

123253565 is a deficient number, since it is larger than the sum of its proper divisors (26677243).

123253565 is an equidigital number, since it uses as much as digits as its factorization.

123253565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 337759.

The product of its digits is 27000, while the sum is 32.

The square root of 123253565 is about 11101.9622139512. The cubic root of 123253565 is about 497.6604904634.

The spelling of 123253565 in words is "one hundred twenty-three million, two hundred fifty-three thousand, five hundred sixty-five".