242654557 has 2 divisors, whose sum is σ = 242654558. Its totient is φ = 242654556.

The previous prime is 242654543. The next prime is 242654569. The reversal of 242654557 is 755456242.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 233050756 + 9603801 = 15266^2 + 3099^2 .

It is a cyclic number.

It is not a de Polignac number, because 242654557 - 2⁷ = 242654429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (242654597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121327278 + 121327279.

It is an arithmetic number, because the mean of its divisors is an integer number (121327279).

Almost surely, 2^242654557 is an apocalyptic number.

It is an amenable number.

242654557 is a deficient number, since it is larger than the sum of its proper divisors (1).

242654557 is an equidigital number, since it uses as much as digits as its factorization.

242654557 is an evil number, because the sum of its binary digits is even.

The product of its digits is 336000, while the sum is 40.

The square root of 242654557 is about 15577.3732381297. The cubic root of 242654557 is about 623.7293069334.

The spelling of 242654557 in words is "two hundred forty-two million, six hundred fifty-four thousand, five hundred fifty-seven".