1142532440 has 128 divisors (see below), whose sum is σ = 3012664320. Its totient is φ = 381888000.

The previous prime is 1142532421. The next prime is 1142532451. The reversal of 1142532440 is 442352411.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2578859 + ... + 2579301.

It is an arithmetic number, because the mean of its divisors is an integer number (23536440).

Almost surely, 2^1142532440 is an apocalyptic number.

1142532440 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 1142532440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1506332160).

1142532440 is an abundant number, since it is smaller than the sum of its proper divisors (1870131880).

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

1142532440 is a wasteful number, since it uses less digits than its factorization.

1142532440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673 (or 669 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 1142532440 is about 33801.3674279607. The cubic root of 1142532440 is about 1045.4168921857.

Adding to 1142532440 its reverse (442352411), we get a palindrome (1584884851).

The spelling of 1142532440 in words is "one billion, one hundred forty-two million, five hundred thirty-two thousand, four hundred forty".