123445 has 8 divisors (see below), whose sum is σ = 169344. Its totient is φ = 84624.

The previous prime is 123439. The next prime is 123449. The reversal of 123445 is 544321.

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 123445 - 2¹⁵ = 90677 is a prime.

It is a plaindrome in base 10 and base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123449) 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, 1729 + ... + 1798.

It is an arithmetic number, because the mean of its divisors is an integer number (21168).

2¹²³⁴⁴⁵ is an apocalyptic number.

It is an amenable number.

123445 is a deficient number, since it is larger than the sum of its proper divisors (45899).

123445 is an equidigital number, since it uses as much as digits as its factorization.

123445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3539.

The product of its digits is 480, while the sum is 19.

The square root of 123445 is about 351.3474064228. The cubic root of 123445 is about 49.7918009329.

Adding to 123445 its reverse (544321), we get a palindrome (667766).

The spelling of 123445 in words is "one hundred twenty-three thousand, four hundred forty-five".