245243140 has 48 divisors (see below), whose sum is σ = 545816880. Its totient is φ = 92395520.

The previous prime is 245243129. The next prime is 245243153. The reversal of 245243140 is 41342542.

It is a happy number.

245243140 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 34644996 + 210598144 = 5886^2 + 14512^2 .

245243140 is strictly pandigital in base 9.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18624 + ... + 28936.

It is an arithmetic number, because the mean of its divisors is an integer number (11371185).

Almost surely, 2^245243140 is an apocalyptic number.

245243140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 245243140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (272908440).

245243140 is an abundant number, since it is smaller than the sum of its proper divisors (300573740).

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

245243140 is a wasteful number, since it uses less digits than its factorization.

245243140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10392 (or 10390 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 25.

The square root of 245243140 is about 15660.2407388903. The cubic root of 245243140 is about 625.9394001364.

Adding to 245243140 its reverse (41342542), we get a palindrome (286585682).

The spelling of 245243140 in words is "two hundred forty-five million, two hundred forty-three thousand, one hundred forty".