1143252020 has 48 divisors (see below), whose sum is σ = 2424183888. Its totient is φ = 452874240.

The previous prime is 1143252001. The next prime is 1143252041. The reversal of 1143252020 is 202523411.

It can be written as a sum of positive squares in 8 ways, for example, as 111429136 + 1031822884 = 10556^2 + 32122^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1143251983 and 1143252001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1698404 + ... + 1699076.

It is an arithmetic number, because the mean of its divisors is an integer number (50503831).

Almost surely, 2^1143252020 is an apocalyptic number.

1143252020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1143252020 is an abundant number, since it is smaller than the sum of its proper divisors (1280931868).

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

1143252020 is a wasteful number, since it uses less digits than its factorization.

1143252020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1380 (or 1378 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1143252020 is about 33812.0099964495. The cubic root of 1143252020 is about 1045.6363179656.

Adding to 1143252020 its reverse (202523411), we get a palindrome (1345775431).

The spelling of 1143252020 in words is "one billion, one hundred forty-three million, two hundred fifty-two thousand, twenty".