242401221 has 32 divisors (see below), whose sum is σ = 381004800. Its totient is φ = 151884720.

The previous prime is 242401219. The next prime is 242401253. The reversal of 242401221 is 122104242.

242401221 is a `hidden beast` number, since 2 + 42 + 401 + 221 = 666.

It is not a de Polignac number, because 242401221 - 2¹ = 242401219 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 242401194 and 242401203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242401261) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65400 + ... + 69006.

It is an arithmetic number, because the mean of its divisors is an integer number (11906400).

Almost surely, 2^242401221 is an apocalyptic number.

It is an amenable number.

242401221 is a deficient number, since it is larger than the sum of its proper divisors (138603579).

242401221 is a wasteful number, since it uses less digits than its factorization.

242401221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3766 (or 3760 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 242401221 is about 15569.2395768066. The cubic root of 242401221 is about 623.5121695741.

Adding to 242401221 its reverse (122104242), we get a palindrome (364505463).

The spelling of 242401221 in words is "two hundred forty-two million, four hundred one thousand, two hundred twenty-one".