242501421 has 4 divisors (see below), whose sum is σ = 323335232. Its totient is φ = 161667612.

The previous prime is 242501419. The next prime is 242501453. The reversal of 242501421 is 124105242.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 242501421 - 2¹ = 242501419 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 (242501411) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40416901 + ... + 40416906.

It is an arithmetic number, because the mean of its divisors is an integer number (80833808).

Almost surely, 2^242501421 is an apocalyptic number.

It is an amenable number.

242501421 is a deficient number, since it is larger than the sum of its proper divisors (80833811).

242501421 is an equidigital number, since it uses as much as digits as its factorization.

242501421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80833810.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 242501421 is about 15572.4571278909. The cubic root of 242501421 is about 623.5980702868.

Adding to 242501421 its reverse (124105242), we get a palindrome (366606663).

The spelling of 242501421 in words is "two hundred forty-two million, five hundred one thousand, four hundred twenty-one".