1142213140 has 48 divisors (see below), whose sum is σ = 2498202000. Its totient is φ = 438136832.

The previous prime is 1142213117. The next prime is 1142213147. The reversal of 1142213140 is 413122411.

It can be written as a sum of positive squares in 8 ways, for example, as 116035984 + 1026177156 = 10772^2 + 32034^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1142213147) 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, 79812 + ... + 93028.

It is an arithmetic number, because the mean of its divisors is an integer number (52045875).

Almost surely, 2^1142213140 is an apocalyptic number.

1142213140 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 1142213140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1249101000).

1142213140 is an abundant number, since it is smaller than the sum of its proper divisors (1355988860).

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

1142213140 is a wasteful number, since it uses less digits than its factorization.

1142213140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13404 (or 13402 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 1142213140 is about 33796.6439162234. The cubic root of 1142213140 is about 1045.3194966393.

Adding to 1142213140 its reverse (413122411), we get a palindrome (1555335551).

The spelling of 1142213140 in words is "one billion, one hundred forty-two million, two hundred thirteen thousand, one hundred forty".