124242421 has 8 divisors (see below), whose sum is σ = 127093304. Its totient is φ = 121417920.

The previous prime is 124242413. The next prime is 124242439.

124242421 = T₄₇₈ + T₄₇₉ + ... + T₉₄₈.

124242421 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 4 ways, for example, as 16892100 + 107350321 = 4110^2 + 10361^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 124242421 - 2³ = 124242413 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 124242392 and 124242401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (124242821) 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, 3091 + ... + 16063.

It is an arithmetic number, because the mean of its divisors is an integer number (15886663).

Almost surely, 2^124242421 is an apocalyptic number.

It is an amenable number.

124242421 is a deficient number, since it is larger than the sum of its proper divisors (2850883).

124242421 is a wasteful number, since it uses less digits than its factorization.

124242421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13191.

The product of its digits is 1024, while the sum is 22.

The square root of 124242421 is about 11146.4084350072. The cubic root of 124242421 is about 498.9878471424.

The spelling of 124242421 in words is "one hundred twenty-four million, two hundred forty-two thousand, four hundred twenty-one".