124522021 has 4 divisors (see below), whose sum is σ = 134100652. Its totient is φ = 114943392.

The previous prime is 124521959. The next prime is 124522031. The reversal of 124522021 is 120225421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 120225421 = 59 ⋅2037719.

It can be written as a sum of positive squares in 2 ways, for example, as 80299521 + 44222500 = 8961^2 + 6650^2 .

It is a cyclic number.

It is not a de Polignac number, because 124522021 - 2¹¹ = 124519973 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 124522021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124522031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4789296 + ... + 4789321.

It is an arithmetic number, because the mean of its divisors is an integer number (33525163).

Almost surely, 2^124522021 is an apocalyptic number.

It is an amenable number.

124522021 is a deficient number, since it is larger than the sum of its proper divisors (9578631).

124522021 is an equidigital number, since it uses as much as digits as its factorization.

124522021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9578630.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 124522021 is about 11158.9435431854. The cubic root of 124522021 is about 499.3618806204.

Adding to 124522021 its reverse (120225421), we get a palindrome (244747442).

The spelling of 124522021 in words is "one hundred twenty-four million, five hundred twenty-two thousand, twenty-one".