1142263540 has 48 divisors (see below), whose sum is σ = 2642782464. Its totient is φ = 411248000.

The previous prime is 1142263537. The next prime is 1142263547. The reversal of 1142263540 is 453622411.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1142263499 and 1142263508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142263547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3484 + ... + 47923.

It is an arithmetic number, because the mean of its divisors is an integer number (55057968).

Almost surely, 2^1142263540 is an apocalyptic number.

1142263540 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 1142263540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1321391232).

1142263540 is an abundant number, since it is smaller than the sum of its proper divisors (1500518924).

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

1142263540 is a wasteful number, since it uses less digits than its factorization.

1142263540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51528 (or 51526 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 1142263540 is about 33797.3895441645. The cubic root of 1142263540 is about 1045.3348712735.

Adding to 1142263540 its reverse (453622411), we get a palindrome (1595885951).

The spelling of 1142263540 in words is "one billion, one hundred forty-two million, two hundred sixty-three thousand, five hundred forty".