124022821 has 16 divisors (see below), whose sum is σ = 140459760. Its totient is φ = 108702720.

The previous prime is 124022819. The next prime is 124022851. The reversal of 124022821 is 128220421.

It can be written as a sum of positive squares in 8 ways, for example, as 4972900 + 119049921 = 2230^2 + 10911^2 .

It is a cyclic number.

It is not a de Polignac number, because 124022821 - 2¹ = 124022819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 124022792 and 124022801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124022851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20301 + ... + 25693.

It is an arithmetic number, because the mean of its divisors is an integer number (8778735).

Almost surely, 2^124022821 is an apocalyptic number.

It is an amenable number.

124022821 is a deficient number, since it is larger than the sum of its proper divisors (16436939).

124022821 is a wasteful number, since it uses less digits than its factorization.

124022821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5496.

The product of its (nonzero) digits is 512, while the sum is 22.

The square root of 124022821 is about 11136.5533716676. The cubic root of 124022821 is about 498.6936847197.

The spelling of 124022821 in words is "one hundred twenty-four million, twenty-two thousand, eight hundred twenty-one".