1144242140 has 12 divisors (see below), whose sum is σ = 2402908536. Its totient is φ = 457696848.

The previous prime is 1144242139. The next prime is 1144242179. The reversal of 1144242140 is 412424411.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28606034 + ... + 28606073.

It is an arithmetic number, because the mean of its divisors is an integer number (200242378).

Almost surely, 2^1144242140 is an apocalyptic number.

1144242140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1144242140 is an abundant number, since it is smaller than the sum of its proper divisors (1258666396).

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

1144242140 is a wasteful number, since it uses less digits than its factorization.

1144242140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57212116 (or 57212114 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

The square root of 1144242140 is about 33826.6483707742. The cubic root of 1144242140 is about 1045.9380906513.

Adding to 1144242140 its reverse (412424411), we get a palindrome (1556666551).

The spelling of 1144242140 in words is "one billion, one hundred forty-four million, two hundred forty-two thousand, one hundred forty".