123448721 has 8 divisors (see below), whose sum is σ = 134753088. Its totient is φ = 112158000.

The previous prime is 123448711. The next prime is 123448753. The reversal of 123448721 is 127844321.

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 123448721 - 2¹⁰ = 123447697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123448711) 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, 28691 + ... + 32711.

It is an arithmetic number, because the mean of its divisors is an integer number (16844136).

Almost surely, 2^123448721 is an apocalyptic number.

123448721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123448721 is a deficient number, since it is larger than the sum of its proper divisors (11304367).

123448721 is a wasteful number, since it uses less digits than its factorization.

123448721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6823.

The product of its digits is 10752, while the sum is 32.

The square root of 123448721 is about 11110.7479946221. The cubic root of 123448721 is about 497.9230121898.

It can be divided in two parts, 123 and 448721, that added together give a palindrome (448844).

The spelling of 123448721 in words is "one hundred twenty-three million, four hundred forty-eight thousand, seven hundred twenty-one".