123579 has 16 divisors (see below), whose sum is σ = 192000. Its totient is φ = 78408.

The previous prime is 123553. The next prime is 123581. The reversal of 123579 is 975321.

123579 = 62² + 63² + ... + 84².

123579 is nontrivially palindromic in base 7.

It is not a de Polignac number, because 123579 - 2⁵ = 123547 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a d-powerful number, because it can be written as 1 + 2¹¹ + 5⁵ + 3³ + 7⁶ + 9³ .

It is a plaindrome in base 10.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (123379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 522 + ... + 720.

It is an arithmetic number, because the mean of its divisors is an integer number (12000).

2¹²³⁵⁷⁹ is an apocalyptic number.

123579 is a deficient number, since it is larger than the sum of its proper divisors (68421).

123579 is a wasteful number, since it uses less digits than its factorization.

123579 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 225 counting only the distinct ones).

The product of its digits is 1890, while the sum is 27.

The square root of 123579 is about 351.5380491497. The cubic root of 123579 is about 49.8098108121.

It can be divided in two parts, 123 and 579, that multiplied together give a palindrome (71217).

The spelling of 123579 in words is "one hundred twenty-three thousand, five hundred seventy-nine".