242579261 has 2 divisors, whose sum is σ = 242579262. Its totient is φ = 242579260.

The previous prime is 242579243. The next prime is 242579263. The reversal of 242579261 is 162975242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221831236 + 20748025 = 14894^2 + 4555^2 .

It is a cyclic number.

It is not a de Polignac number, because 242579261 - 2²⁶ = 175470397 is a prime.

It is a super-2 number, since 2×242579261² = 117689395734612242, which contains 22 as substring.

Together with 242579263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242579263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121289630 + 121289631.

It is an arithmetic number, because the mean of its divisors is an integer number (121289631).

Almost surely, 2^242579261 is an apocalyptic number.

It is an amenable number.

242579261 is a deficient number, since it is larger than the sum of its proper divisors (1).

242579261 is an equidigital number, since it uses as much as digits as its factorization.

242579261 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 38.

The square root of 242579261 is about 15574.9562118165. The cubic root of 242579261 is about 623.6647856087.

The spelling of 242579261 in words is "two hundred forty-two million, five hundred seventy-nine thousand, two hundred sixty-one".