242501381 has 4 divisors (see below), whose sum is σ = 248140992. Its totient is φ = 236861772.

The previous prime is 242501377. The next prime is 242501383. The reversal of 242501381 is 183105242.

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 a cyclic number.

It is not a de Polignac number, because 242501381 - 2² = 242501377 is a prime.

It is a super-2 number, since 2×242501381² = 117613839573814322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 242501381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242501383) 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 3 ways as a sum of consecutive naturals, for example, 2819741 + ... + 2819826.

It is an arithmetic number, because the mean of its divisors is an integer number (62035248).

Almost surely, 2^242501381 is an apocalyptic number.

It is an amenable number.

242501381 is a deficient number, since it is larger than the sum of its proper divisors (5639611).

242501381 is an equidigital number, since it uses as much as digits as its factorization.

242501381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5639610.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 242501381 is about 15572.4558435720. The cubic root of 242501381 is about 623.5980359999.

The spelling of 242501381 in words is "two hundred forty-two million, five hundred one thousand, three hundred eighty-one".