123426865 has 4 divisors (see below), whose sum is σ = 148112244. Its totient is φ = 98741488.

The previous prime is 123426847. The next prime is 123426883. The reversal of 123426865 is 568624321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 568624321 = 4409 ⋅128969.

It is an interprime number because it is at equal distance from previous prime (123426847) and next prime (123426883).

It can be written as a sum of positive squares in 2 ways, for example, as 26286129 + 97140736 = 5127^2 + 9856^2 .

It is a cyclic number.

It is not a de Polignac number, because 123426865 - 2⁵ = 123426833 is a prime.

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, 12342682 + ... + 12342691.

It is an arithmetic number, because the mean of its divisors is an integer number (37028061).

Almost surely, 2^123426865 is an apocalyptic number.

It is an amenable number.

123426865 is a deficient number, since it is larger than the sum of its proper divisors (24685379).

123426865 is an equidigital number, since it uses as much as digits as its factorization.

123426865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24685378.

The product of its digits is 69120, while the sum is 37.

The square root of 123426865 is about 11109.7643989420. The cubic root of 123426865 is about 497.8936255004.

The spelling of 123426865 in words is "one hundred twenty-three million, four hundred twenty-six thousand, eight hundred sixty-five".