242621525 has 6 divisors (see below), whose sum is σ = 300850722. Its totient is φ = 194097200.

The previous prime is 242621513. The next prime is 242621551. The reversal of 242621525 is 525126242.

It can be written as a sum of positive squares in 3 ways, for example, as 74063236 + 168558289 = 8606^2 + 12983^2 .

It is not a de Polignac number, because 242621525 - 2¹⁰ = 242620501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4852406 + ... + 4852455.

It is an arithmetic number, because the mean of its divisors is an integer number (50141787).

Almost surely, 2^242621525 is an apocalyptic number.

242621525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

242621525 is a deficient number, since it is larger than the sum of its proper divisors (58229197).

242621525 is an equidigital number, since it uses as much as digits as its factorization.

242621525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9704871 (or 9704866 counting only the distinct ones).

The product of its digits is 9600, while the sum is 29.

The square root of 242621525 is about 15576.3129462656. The cubic root of 242621525 is about 623.7010033762.

Adding to 242621525 its reverse (525126242), we get a palindrome (767747767).

The spelling of 242621525 in words is "two hundred forty-two million, six hundred twenty-one thousand, five hundred twenty-five".