245242489 has 2 divisors, whose sum is σ = 245242490. Its totient is φ = 245242488.

The previous prime is 245242477. The next prime is 245242499. The reversal of 245242489 is 984242542.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 245235600 + 6889 = 15660^2 + 83^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-245242489 is a prime.

It is a super-4 number, since 4×245242489⁴ (a number of 35 digits) contains 4444 as substring.

It is not a weakly prime, because it can be changed into another prime (245242499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 122621244 + 122621245.

It is an arithmetic number, because the mean of its divisors is an integer number (122621245).

Almost surely, 2^245242489 is an apocalyptic number.

It is an amenable number.

245242489 is a deficient number, since it is larger than the sum of its proper divisors (1).

245242489 is an equidigital number, since it uses as much as digits as its factorization.

245242489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 184320, while the sum is 40.

The square root of 245242489 is about 15660.2199537554. The cubic root of 245242489 is about 625.9388462821.

The spelling of 245242489 in words is "two hundred forty-five million, two hundred forty-two thousand, four hundred eighty-nine".