242621599 has 4 divisors (see below), whose sum is σ = 264678120. Its totient is φ = 220565080.

The previous prime is 242621597. The next prime is 242621611. The reversal of 242621599 is 995126242.

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 242621599 - 2¹ = 242621597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (242621597) 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 3 ways as a sum of consecutive naturals, for example, 11028244 + ... + 11028265.

It is an arithmetic number, because the mean of its divisors is an integer number (66169530).

Almost surely, 2^242621599 is an apocalyptic number.

242621599 is a deficient number, since it is larger than the sum of its proper divisors (22056521).

242621599 is a wasteful number, since it uses less digits than its factorization.

242621599 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22056520.

The product of its digits is 77760, while the sum is 40.

The square root of 242621599 is about 15576.3153216671. The cubic root of 242621599 is about 623.7010667862.

It can be divided in two parts, 2426 and 21599, that added together give a square (24025 = 155²).

The spelling of 242621599 in words is "two hundred forty-two million, six hundred twenty-one thousand, five hundred ninety-nine".