242559591 has 4 divisors (see below), whose sum is σ = 323412792. Its totient is φ = 161706392.

The previous prime is 242559539. The next prime is 242559601. The reversal of 242559591 is 195955242.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 242559591 - 2⁷ = 242559463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242559091) 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, 40426596 + ... + 40426601.

It is an arithmetic number, because the mean of its divisors is an integer number (80853198).

Almost surely, 2^242559591 is an apocalyptic number.

242559591 is a deficient number, since it is larger than the sum of its proper divisors (80853201).

242559591 is an equidigital number, since it uses as much as digits as its factorization.

242559591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80853200.

The product of its digits is 162000, while the sum is 42.

The square root of 242559591 is about 15574.3247365656. The cubic root of 242559591 is about 623.6479281386.

The spelling of 242559591 in words is "two hundred forty-two million, five hundred fifty-nine thousand, five hundred ninety-one".