245121440 has 24 divisors (see below), whose sum is σ = 579099780. Its totient is φ = 98048512.

The previous prime is 245121421. The next prime is 245121467. The reversal of 245121440 is 44121542.

245121440 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 235806736 + 9314704 = 15356^2 + 3052^2 .

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 in 3 ways as a sum of consecutive naturals, for example, 765845 + ... + 766164.

Almost surely, 2^245121440 is an apocalyptic number.

245121440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

245121440 is an abundant number, since it is smaller than the sum of its proper divisors (333978340).

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

245121440 is a wasteful number, since it uses less digits than its factorization.

245121440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1532024 (or 1532016 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 245121440 is about 15656.3546204089. The cubic root of 245121440 is about 625.8358438192.

Adding to 245121440 its reverse (44121542), we get a palindrome (289242982).

It can be divided in two parts, 24512 and 1440, that added together give a palindrome (25952).

The spelling of 245121440 in words is "two hundred forty-five million, one hundred twenty-one thousand, four hundred forty".