1203545540 has 24 divisors (see below), whose sum is σ = 2530747800. Its totient is φ = 480789248.

The previous prime is 1203545531. The next prime is 1203545561. The reversal of 1203545540 is 455453021.

It can be written as a sum of positive squares in 4 ways, for example, as 23348224 + 1180197316 = 4832^2 + 34354^2 .

It is a super-3 number, since 3×1203545540³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23465 + ... + 54384.

It is an arithmetic number, because the mean of its divisors is an integer number (105447825).

Almost surely, 2^1203545540 is an apocalyptic number.

1203545540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1203545540 is an abundant number, since it is smaller than the sum of its proper divisors (1327202260).

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

1203545540 is a wasteful number, since it uses less digits than its factorization.

1203545540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78631 (or 78629 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 1203545540 is about 34692.1538679858. The cubic root of 1203545540 is about 1063.7041230273.

Adding to 1203545540 its reverse (455453021), we get a palindrome (1658998561).

It can be divided in two parts, 12035 and 45540, that added together give a palindrome (57575).

The spelling of 1203545540 in words is "one billion, two hundred three million, five hundred forty-five thousand, five hundred forty".