242270521 has 4 divisors (see below), whose sum is σ = 242458612. Its totient is φ = 242082432.

The previous prime is 242270513. The next prime is 242270533. The reversal of 242270521 is 125072242.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 241460521 + 810000 = 15539^2 + 900^2 .

It is a cyclic number.

It is not a de Polignac number, because 242270521 - 2³ = 242270513 is a prime.

It is a super-2 number, since 2×242270521² = 117390010691222882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242270551) 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, 92100 + ... + 94693.

It is an arithmetic number, because the mean of its divisors is an integer number (60614653).

Almost surely, 2^242270521 is an apocalyptic number.

It is an amenable number.

242270521 is a deficient number, since it is larger than the sum of its proper divisors (188091).

242270521 is a wasteful number, since it uses less digits than its factorization.

242270521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188090.

The product of its (nonzero) digits is 2240, while the sum is 25.

The square root of 242270521 is about 15565.0416318107. The cubic root of 242270521 is about 623.4000858543.

The spelling of 242270521 in words is "two hundred forty-two million, two hundred seventy thousand, five hundred twenty-one".