1142251540 has 24 divisors (see below), whose sum is σ = 2405007360. Its totient is φ = 455704608.

The previous prime is 1142251529. The next prime is 1142251547. The reversal of 1142251540 is 451522411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142251547) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66900 + ... + 82219.

It is an arithmetic number, because the mean of its divisors is an integer number (100208640).

Almost surely, 2^1142251540 is an apocalyptic number.

1142251540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1142251540 is an abundant number, since it is smaller than the sum of its proper divisors (1262755820).

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

1142251540 is a wasteful number, since it uses less digits than its factorization.

1142251540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149511 (or 149509 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1142251540 is about 33797.2120151944. The cubic root of 1142251540 is about 1045.3312106873.

Adding to 1142251540 its reverse (451522411), we get a palindrome (1593773951).

The spelling of 1142251540 in words is "one billion, one hundred forty-two million, two hundred fifty-one thousand, five hundred forty".