1142157100 has 72 divisors (see below), whose sum is σ = 2844817920. Its totient is φ = 389901120.

The previous prime is 1142157091. The next prime is 1142157143. The reversal of 1142157100 is 17512411.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 163887 + ... + 170713.

It is an arithmetic number, because the mean of its divisors is an integer number (39511360).

Almost surely, 2^1142157100 is an apocalyptic number.

1142157100 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 1142157100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1422408960).

1142157100 is an abundant number, since it is smaller than the sum of its proper divisors (1702660820).

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

1142157100 is a wasteful number, since it uses less digits than its factorization.

1142157100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7087 (or 7080 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 22.

The square root of 1142157100 is about 33795.8148296501. The cubic root of 1142157100 is about 1045.3024009792.

Adding to 1142157100 its reverse (17512411), we get a palindrome (1159669511).

The spelling of 1142157100 in words is "one billion, one hundred forty-two million, one hundred fifty-seven thousand, one hundred".