242421253 has 8 divisors (see below), whose sum is σ = 248204160. Its totient is φ = 236664480.

The previous prime is 242421227. The next prime is 242421269. The reversal of 242421253 is 352124242.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-242421253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242422253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12918 + ... + 25528.

It is an arithmetic number, because the mean of its divisors is an integer number (31025520).

Almost surely, 2^242421253 is an apocalyptic number.

It is an amenable number.

242421253 is a deficient number, since it is larger than the sum of its proper divisors (5782907).

242421253 is a wasteful number, since it uses less digits than its factorization.

242421253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13067.

The product of its digits is 3840, while the sum is 25.

The square root of 242421253 is about 15569.8828833103. The cubic root of 242421253 is about 623.5293447513.

Adding to 242421253 its reverse (352124242), we get a palindrome (594545495).

The spelling of 242421253 in words is "two hundred forty-two million, four hundred twenty-one thousand, two hundred fifty-three".