123721241 has 8 divisors (see below), whose sum is σ = 142510080. Its totient is φ = 105211008.

The previous prime is 123721207. The next prime is 123721243. The reversal of 123721241 is 142127321.

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

It is not a de Polignac number, because 123721241 - 2¹⁰ = 123720217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (123721243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68696 + ... + 70473.

It is an arithmetic number, because the mean of its divisors is an integer number (17813760).

Almost surely, 2^123721241 is an apocalyptic number.

It is an amenable number.

123721241 is a deficient number, since it is larger than the sum of its proper divisors (18788839).

123721241 is a wasteful number, since it uses less digits than its factorization.

123721241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139303.

The product of its digits is 672, while the sum is 23.

The square root of 123721241 is about 11123.0050346118. The cubic root of 123721241 is about 498.2891405972.

Adding to 123721241 its reverse (142127321), we get a palindrome (265848562).

The spelling of 123721241 in words is "one hundred twenty-three million, seven hundred twenty-one thousand, two hundred forty-one".