124020421 has 12 divisors (see below), whose sum is σ = 144450540. Its totient is φ = 106169280.

The previous prime is 124020409. The next prime is 124020431.

124020421 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 2 ways, for example, as 37344321 + 86676100 = 6111^2 + 9310^2 .

It is not a de Polignac number, because 124020421 - 2¹¹ = 124018373 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 124020395 and 124020404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124020401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 71715 + ... + 73423.

It is an arithmetic number, because the mean of its divisors is an integer number (12037545).

Almost surely, 2^124020421 is an apocalyptic number.

It is an amenable number.

124020421 is a deficient number, since it is larger than the sum of its proper divisors (20430119).

124020421 is a wasteful number, since it uses less digits than its factorization.

124020421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3204 (or 3197 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 124020421 is about 11136.4456178801. The cubic root of 124020421 is about 498.6904679123.

The spelling of 124020421 in words is "one hundred twenty-four million, twenty thousand, four hundred twenty-one".