1203531540 has 96 divisors (see below), whose sum is σ = 3424813056. Its totient is φ = 315745920.

The previous prime is 1203531533. The next prime is 1203531547. The reversal of 1203531540 is 451353021.

It is an interprime number because it is at equal distance from previous prime (1203531533) and next prime (1203531547).

It is a self number, because there is not a number n which added to its sum of digits gives 1203531540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1203531547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1907025 + ... + 1907655.

It is an arithmetic number, because the mean of its divisors is an integer number (35675136).

Almost surely, 2^1203531540 is an apocalyptic number.

1203531540 is a gapful number since it is divisible by the number (10) 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 1203531540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1712406528).

1203531540 is an abundant number, since it is smaller than the sum of its proper divisors (2221281516).

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

1203531540 is a wasteful number, since it uses less digits than its factorization.

1203531540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109 (or 1107 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 1203531540 is about 34691.9520926684. The cubic root of 1203531540 is about 1063.6999985703.

Adding to 1203531540 its reverse (451353021), we get a palindrome (1654884561).

The spelling of 1203531540 in words is "one billion, two hundred three million, five hundred thirty-one thousand, five hundred forty".