1143621000 has 192 divisors, whose sum is σ = 3991104000. Its totient is φ = 295056000.

The previous prime is 1143620941. The next prime is 1143621023. The reversal of 1143621000 is 1263411.

It is a happy number.

1143621000 is a `hidden beast` number, since 1 + 1 + 43 + 621 + 0 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 276951 + ... + 281049.

It is an arithmetic number, because the mean of its divisors is an integer number (20787000).

Almost surely, 2^1143621000 is an apocalyptic number.

1143621000 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 1143621000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1995552000).

1143621000 is an abundant number, since it is smaller than the sum of its proper divisors (2847483000).

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

1143621000 is a wasteful number, since it uses less digits than its factorization.

1143621000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4157 (or 4140 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1143621000 is about 33817.4659015131. The cubic root of 1143621000 is about 1045.7487975070.

Adding to 1143621000 its reverse (1263411), we get a palindrome (1144884411).

The spelling of 1143621000 in words is "one billion, one hundred forty-three million, six hundred twenty-one thousand".