245404242 has 24 divisors (see below), whose sum is σ = 551403216. Its totient is φ = 81801252.

The previous prime is 245404241. The next prime is 245404253. The reversal of 245404242 is 242404542.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (245404241) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 251988 + ... + 252959.

It is an arithmetic number, because the mean of its divisors is an integer number (22975134).

Almost surely, 2^245404242 is an apocalyptic number.

245404242 is an abundant number, since it is smaller than the sum of its proper divisors (305998974).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

245404242 is an equidigital number, since it uses as much as digits as its factorization.

245404242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504964 (or 504952 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

The square root of 245404242 is about 15665.3835573854. The cubic root of 245404242 is about 626.0764315146.

Adding to 245404242 its reverse (242404542), we get a palindrome (487808784).

It can be divided in two parts, 24540 and 4242, that added together give a palindrome (28782).

The spelling of 245404242 in words is "two hundred forty-five million, four hundred four thousand, two hundred forty-two".