124240821 has 8 divisors (see below), whose sum is σ = 166125120. Its totient is φ = 82591872.

The previous prime is 124240799. The next prime is 124240873. The reversal of 124240821 is 128042421.

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

It is not a de Polignac number, because 124240821 - 2⁵ = 124240789 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 124240791 and 124240800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124240891) 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, 57601 + ... + 59718.

It is an arithmetic number, because the mean of its divisors is an integer number (20765640).

Almost surely, 2^124240821 is an apocalyptic number.

It is an amenable number.

124240821 is a deficient number, since it is larger than the sum of its proper divisors (41884299).

124240821 is a wasteful number, since it uses less digits than its factorization.

124240821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117675.

The product of its (nonzero) digits is 1024, while the sum is 24.

The square root of 124240821 is about 11146.3366627785. The cubic root of 124240821 is about 498.9857051365.

The spelling of 124240821 in words is "one hundred twenty-four million, two hundred forty thousand, eight hundred twenty-one".