245727505 has 4 divisors (see below), whose sum is σ = 294873012. Its totient is φ = 196582000.

The previous prime is 245727497. The next prime is 245727511. The reversal of 245727505 is 505727542.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 104878081 + 140849424 = 10241^2 + 11868^2 .

It is not a de Polignac number, because 245727505 - 2³ = 245727497 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24572746 + ... + 24572755.

It is an arithmetic number, because the mean of its divisors is an integer number (73718253).

Almost surely, 2^245727505 is an apocalyptic number.

It is an amenable number.

245727505 is a deficient number, since it is larger than the sum of its proper divisors (49145507).

245727505 is an equidigital number, since it uses as much as digits as its factorization.

245727505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49145506.

The product of its (nonzero) digits is 98000, while the sum is 37.

The square root of 245727505 is about 15675.6979110979. The cubic root of 245727505 is about 626.3512142469.

Adding to 245727505 its sum of digits (37), we get a palindrome (245727542).

The spelling of 245727505 in words is "two hundred forty-five million, seven hundred twenty-seven thousand, five hundred five".