245242 has 8 divisors (see below), whose sum is σ = 389556. Its totient is φ = 115392.

The previous prime is 245209. The next prime is 245251. The reversal of 245242 is 242542.

It can be written as a sum of positive squares in 2 ways, for example, as 219961 + 25281 = 469^2 + 159^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

245242 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3573 + ... + 3640.

2²⁴⁵²⁴² is an apocalyptic number.

245242 is a deficient number, since it is larger than the sum of its proper divisors (144314).

245242 is a wasteful number, since it uses less digits than its factorization.

245242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7232.

The product of its digits is 640, while the sum is 19.

The square root of 245242 is about 495.2191434103. The cubic root of 245242 is about 62.5938430253.

Adding to 245242 its reverse (242542), we get a palindrome (487784).

The spelling of 245242 in words is "two hundred forty-five thousand, two hundred forty-two".