245120321225 has 48 divisors (see below), whose sum is σ = 349115498928. Its totient is φ = 169120112640.

The previous prime is 245120321221. The next prime is 245120321263. The reversal of 245120321225 is 522123021542.

It is a happy number.

It can be written as a sum of positive squares in 24 ways, for example, as 87917587081 + 157202734144 = 296509^2 + 396488^2 .

It is not a de Polignac number, because 245120321225 - 2² = 245120321221 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (245120321221) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 595007 + ... + 918843.

It is an arithmetic number, because the mean of its divisors is an integer number (7273239561).

Almost surely, 2^245120321225 is an apocalyptic number.

245120321225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

245120321225 is a deficient number, since it is larger than the sum of its proper divisors (103995177703).

245120321225 is a wasteful number, since it uses less digits than its factorization.

245120321225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324014 (or 324009 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 245120321225 its reverse (522123021542), we get a palindrome (767243342767).

The spelling of 245120321225 in words is "two hundred forty-five billion, one hundred twenty million, three hundred twenty-one thousand, two hundred twenty-five".