242520325 has 6 divisors (see below), whose sum is σ = 300725234. Its totient is φ = 194016240.

The previous prime is 242520319. The next prime is 242520331. The reversal of 242520325 is 523025242.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (242520319) and next prime (242520331).

It can be written as a sum of positive squares in 3 ways, for example, as 25341156 + 217179169 = 5034^2 + 14737^2 .

It is not a de Polignac number, because 242520325 - 2¹³ = 242512133 is a prime.

It is a super-2 number, since 2×242520325² = 117632216076211250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 9700813 = 242520325 / (2 + 4 + 2 + 5 + 2 + 0 + 3 + 2 + 5).

It is a Duffinian number.

242520325 is a modest number, since divided by 20325 gives 2425 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 242520325.

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, 4850382 + ... + 4850431.

Almost surely, 2^242520325 is an apocalyptic number.

242520325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

242520325 is a deficient number, since it is larger than the sum of its proper divisors (58204909).

242520325 is an equidigital number, since it uses as much as digits as its factorization.

242520325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9700823 (or 9700818 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The square root of 242520325 is about 15573.0640851439. The cubic root of 242520325 is about 623.6142738917.

Adding to 242520325 its reverse (523025242), we get a palindrome (765545567).

The spelling of 242520325 in words is "two hundred forty-two million, five hundred twenty thousand, three hundred twenty-five".