1143100 has 72 divisors (see below), whose sum is σ = 2999808. Its totient is φ = 369600.

The previous prime is 1143091. The next prime is 1143101. The reversal of 1143100 is 13411.

1143100 = T₆ + T₇ + ... + T₁₈₉.

It is a happy number.

It is a super-2 number, since 2×1143100² = 2613355220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16065 + ... + 16135.

It is an arithmetic number, because the mean of its divisors is an integer number (41664).

2^1143100 is an apocalyptic number.

1143100 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 1143100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1499904).

1143100 is an abundant number, since it is smaller than the sum of its proper divisors (1856708).

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

1143100 is a wasteful number, since it uses less digits than its factorization.

1143100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 108 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 1143100 is about 1069.1585476439. The cubic root of 1143100 is about 104.5589969282.

Adding to 1143100 its reverse (13411), we get a palindrome (1156511).

The spelling of 1143100 in words is "one million, one hundred forty-three thousand, one hundred".