242891577 has 6 divisors (see below), whose sum is σ = 350843402. Its totient is φ = 161927712.

The previous prime is 242891507. The next prime is 242891587. The reversal of 242891577 is 775198242.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 241211961 + 1679616 = 15531^2 + 1296^2 .

It is not a de Polignac number, because 242891577 - 2¹⁹ = 242367289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (242891507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13493968 + ... + 13493985.

Almost surely, 2^242891577 is an apocalyptic number.

It is an amenable number.

242891577 is a deficient number, since it is larger than the sum of its proper divisors (107951825).

242891577 is a wasteful number, since it uses less digits than its factorization.

242891577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26987959 (or 26987956 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 242891577 is about 15584.9792107657. The cubic root of 242891577 is about 623.9323228500.

The spelling of 242891577 in words is "two hundred forty-two million, eight hundred ninety-one thousand, five hundred seventy-seven".