1142142140 has 12 divisors (see below), whose sum is σ = 2398498536. Its totient is φ = 456856848.

The previous prime is 1142142137. The next prime is 1142142143. The reversal of 1142142140 is 412412411.

It is an interprime number because it is at equal distance from previous prime (1142142137) and next prime (1142142143).

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 57107107 = 1142142140 / (1 + 1 + 4 + 2 + 1 + 4 + 2 + 1 + 4 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142142143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28553534 + ... + 28553573.

It is an arithmetic number, because the mean of its divisors is an integer number (199874878).

Almost surely, 2^1142142140 is an apocalyptic number.

1142142140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1142142140 is an abundant number, since it is smaller than the sum of its proper divisors (1256356396).

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

1142142140 is a wasteful number, since it uses less digits than its factorization.

1142142140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57107116 (or 57107114 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

The square root of 1142142140 is about 33795.5934997449. The cubic root of 1142142140 is about 1045.2978371610.

Adding to 1142142140 its reverse (412412411), we get a palindrome (1554554551).

The spelling of 1142142140 in words is "one billion, one hundred forty-two million, one hundred forty-two thousand, one hundred forty".