124042821 has 8 divisors (see below), whose sum is σ = 189017664. Its totient is φ = 70881600.

The previous prime is 124042817. The next prime is 124042879. The reversal of 124042821 is 128240421.

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

It is not a de Polignac number, because 124042821 - 2² = 124042817 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 124042791 and 124042800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124044821) 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, 2953380 + ... + 2953421.

It is an arithmetic number, because the mean of its divisors is an integer number (23627208).

Almost surely, 2^124042821 is an apocalyptic number.

It is an amenable number.

124042821 is a deficient number, since it is larger than the sum of its proper divisors (64974843).

124042821 is an equidigital number, since it uses as much as digits as its factorization.

124042821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5906811.

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

The square root of 124042821 is about 11137.4512793547. The cubic root of 124042821 is about 498.7204898338.

It can be divided in two parts, 12404 and 2821, that added together give a triangular number (15225 = T₁₇₄).

The spelling of 124042821 in words is "one hundred twenty-four million, forty-two thousand, eight hundred twenty-one".