242544621 has 24 divisors (see below), whose sum is σ = 357682752. Its totient is φ = 146080000.

The previous prime is 242544619. The next prime is 242544647. The reversal of 242544621 is 126445242.

It is not a de Polignac number, because 242544621 - 2¹ = 242544619 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242544611) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 58621 + ... + 62621.

It is an arithmetic number, because the mean of its divisors is an integer number (14903448).

Almost surely, 2^242544621 is an apocalyptic number.

It is an amenable number.

242544621 is a deficient number, since it is larger than the sum of its proper divisors (115138131).

242544621 is a wasteful number, since it uses less digits than its factorization.

242544621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4193 (or 4182 counting only the distinct ones).

The product of its digits is 15360, while the sum is 30.

The square root of 242544621 is about 15573.8441304644. The cubic root of 242544621 is about 623.6350980246.

Adding to 242544621 its reverse (126445242), we get a palindrome (368989863).

The spelling of 242544621 in words is "two hundred forty-two million, five hundred forty-four thousand, six hundred twenty-one".