245445140 has 12 divisors (see below), whose sum is σ = 515434836. Its totient is φ = 98178048.

The previous prime is 245445127. The next prime is 245445143. The reversal of 245445140 is 41544542.

It can be written as a sum of positive squares in 2 ways, for example, as 112826884 + 132618256 = 10622^2 + 11516^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245445143) 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 3 ways as a sum of consecutive naturals, for example, 6136109 + ... + 6136148.

It is an arithmetic number, because the mean of its divisors is an integer number (42952903).

Almost surely, 2^245445140 is an apocalyptic number.

245445140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245445140 is an abundant number, since it is smaller than the sum of its proper divisors (269989696).

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

245445140 is a wasteful number, since it uses less digits than its factorization.

245445140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12272266 (or 12272264 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 29.

The square root of 245445140 is about 15666.6888652325. The cubic root of 245445140 is about 626.1112093047. Note that the first 3 decimals are identical.

Adding to 245445140 its reverse (41544542), we get a palindrome (286989682).

The spelling of 245445140 in words is "two hundred forty-five million, four hundred forty-five thousand, one hundred forty".