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123315 = 358221
BaseRepresentation
bin11110000110110011
320021011020
4132012303
512421230
62350523
71022343
oct360663
9207136
10123315
1184715
125b443
134418a
1432d23
1526810
hex1e1b3

123315 has 8 divisors (see below), whose sum is σ = 197328. Its totient is φ = 65760.

The previous prime is 123311. The next prime is 123323. The reversal of 123315 is 513321.

Adding to 123315 its reverse (513321), we get a palindrome (636636).

It is a happy number.

123315 is nontrivially palindromic in base 14.

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

It is not a de Polignac number, because 123315 - 22 = 123311 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 8221 = 123315 / (1 + 2 + 3 + 3 + 1 + 5).

It is a junction number, because it is equal to n+sod(n) for n = 123294 and 123303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123311) 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, 4096 + ... + 4125.

It is an arithmetic number, because the mean of its divisors is an integer number (24666).

2123315 is an apocalyptic number.

123315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123315 is a deficient number, since it is larger than the sum of its proper divisors (74013).

123315 is an equidigital number, since it uses as much as digits as its factorization.

123315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8229.

The product of its digits is 90, while the sum is 15.

The square root of 123315 is about 351.1623556135. The cubic root of 123315 is about 49.7743162024.

The spelling of 123315 in words is "one hundred twenty-three thousand, three hundred fifteen".

Divisors: 1 3 5 15 8221 24663 41105 123315