1042531440 has 160 divisors (see below), whose sum is σ = 3415495680. Its totient is φ = 262628352.

The previous prime is 1042531439. The next prime is 1042531447. The reversal of 1042531440 is 441352401.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1042531440.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042531447) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 325527 + ... + 328713.

It is an arithmetic number, because the mean of its divisors is an integer number (21346848).

Almost surely, 2^1042531440 is an apocalyptic number.

1042531440 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 1042531440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1707747840).

1042531440 is an abundant number, since it is smaller than the sum of its proper divisors (2372964240).

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

1042531440 is a wasteful number, since it uses less digits than its factorization.

1042531440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3279 (or 3273 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 1042531440 is about 32288.2554499310. The cubic root of 1042531440 is about 1013.9807737291.

Adding to 1042531440 its reverse (441352401), we get a palindrome (1483883841).

The spelling of 1042531440 in words is "one billion, forty-two million, five hundred thirty-one thousand, four hundred forty".