242104021 has 8 divisors (see below), whose sum is σ = 257413464. Its totient is φ = 226913280.

The previous prime is 242103959. The next prime is 242104033. The reversal of 242104021 is 120401242.

It can be written as a sum of positive squares in 4 ways, for example, as 164839921 + 77264100 = 12839^2 + 8790^2 .

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

It is not a de Polignac number, because 242104021 - 2²¹ = 240006869 is a prime.

It is a super-2 number, since 2×242104021² = 117228713968736882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 242103986 and 242104004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242104091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25450 + ... + 33643.

It is an arithmetic number, because the mean of its divisors is an integer number (32176683).

Almost surely, 2^242104021 is an apocalyptic number.

It is an amenable number.

242104021 is a deficient number, since it is larger than the sum of its proper divisors (15309443).

242104021 is a wasteful number, since it uses less digits than its factorization.

242104021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59351.

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

The square root of 242104021 is about 15559.6921884721. The cubic root of 242104021 is about 623.2572429132.

Adding to 242104021 its reverse (120401242), we get a palindrome (362505263).

The spelling of 242104021 in words is "two hundred forty-two million, one hundred four thousand, twenty-one".