242604281 has 4 divisors (see below), whose sum is σ = 243861492. Its totient is φ = 241347072.

The previous prime is 242604277. The next prime is 242604287. The reversal of 242604281 is 182406242.

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 73188025 + 169416256 = 8555^2 + 13016^2 .

It is a cyclic number.

It is not a de Polignac number, because 242604281 - 2² = 242604277 is a prime.

It is a super-2 number, since 2×242604281² = 117713674319053922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242604287) 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, 628316 + ... + 628701.

It is an arithmetic number, because the mean of its divisors is an integer number (60965373).

Almost surely, 2^242604281 is an apocalyptic number.

It is an amenable number.

242604281 is a deficient number, since it is larger than the sum of its proper divisors (1257211).

242604281 is a wasteful number, since it uses less digits than its factorization.

242604281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1257210.

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 242604281 is about 15575.7594036374. The cubic root of 242604281 is about 623.6862267882.

The spelling of 242604281 in words is "two hundred forty-two million, six hundred four thousand, two hundred eighty-one".