1143252720 has 480 divisors, whose sum is σ = 4412289024. Its totient is φ = 263577600.

The previous prime is 1143252709. The next prime is 1143252727. The reversal of 1143252720 is 272523411.

1143252720 is a `hidden beast` number, since 114 + 3 + 2 + 527 + 20 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1143252727) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8727055 + ... + 8727185.

Almost surely, 2^1143252720 is an apocalyptic number.

1143252720 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 1143252720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2206144512).

1143252720 is an abundant number, since it is smaller than the sum of its proper divisors (3269036304).

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

1143252720 is a wasteful number, since it uses less digits than its factorization.

1143252720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 221 (or 212 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 1143252720 is about 33812.0203477994. The cubic root of 1143252720 is about 1045.6365313759.

The spelling of 1143252720 in words is "one billion, one hundred forty-three million, two hundred fifty-two thousand, seven hundred twenty".