245520404 has 6 divisors (see below), whose sum is σ = 429660714. Its totient is φ = 122760200.

The previous prime is 245520397. The next prime is 245520421. The reversal of 245520404 is 404025542.

It can be written as a sum of positive squares in only one way, i.e., 215796100 + 29724304 = 14690^2 + 5452^2 .

It is a congruent 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 as a sum of consecutive naturals, namely, 30690047 + ... + 30690054.

It is an arithmetic number, because the mean of its divisors is an integer number (71610119).

Almost surely, 2^245520404 is an apocalyptic number.

It is an amenable number.

245520404 is a deficient number, since it is larger than the sum of its proper divisors (184140310).

245520404 is a wasteful number, since it uses less digits than its factorization.

245520404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61380105 (or 61380103 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 26.

The square root of 245520404 is about 15669.0907202684. The cubic root of 245520404 is about 626.1752002752.

Adding to 245520404 its reverse (404025542), we get a palindrome (649545946).

The spelling of 245520404 in words is "two hundred forty-five million, five hundred twenty thousand, four hundred four".