123671 has 8 divisors (see below), whose sum is σ = 136320. Its totient is φ = 111672.

The previous prime is 123667. The next prime is 123677. The reversal of 123671 is 176321.

It is a happy number.

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 123671 - 2² = 123667 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123677) 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, 296 + ... + 578.

It is an arithmetic number, because the mean of its divisors is an integer number (17040).

2¹²³⁶⁷¹ is an apocalyptic number.

123671 is a deficient number, since it is larger than the sum of its proper divisors (12649).

123671 is a wasteful number, since it uses less digits than its factorization.

123671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325.

The product of its digits is 252, while the sum is 20.

The square root of 123671 is about 351.6688783501. The cubic root of 123671 is about 49.8221682673.

Adding to 123671 its reverse (176321), we get a palindrome (299992).

Subtracting 123671 from its reverse (176321), we obtain a triangular number (52650 = T₃₂₄).

The spelling of 123671 in words is "one hundred twenty-three thousand, six hundred seventy-one".