1143477252 has 18 divisors (see below), whose sum is σ = 2890456478. Its totient is φ = 381159072.

The previous prime is 1143477229. The next prime is 1143477277. The reversal of 1143477252 is 2527743411.

It can be written as a sum of positive squares in only one way, i.e., 1136633796 + 6843456 = 33714^2 + 2616^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 31763257 = 1143477252 / (1 + 1 + 4 + 3 + 4 + 7 + 7 + 2 + 5 + 2).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 15881593 + ... + 15881664.

Almost surely, 2^1143477252 is an apocalyptic number.

1143477252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1143477252 is an abundant number, since it is smaller than the sum of its proper divisors (1746979226).

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

1143477252 is a wasteful number, since it uses less digits than its factorization.

1143477252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31763267 (or 31763262 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 1143477252 is about 33815.3404832777. The cubic root of 1143477252 is about 1045.7049803692.

The spelling of 1143477252 in words is "one billion, one hundred forty-three million, four hundred seventy-seven thousand, two hundred fifty-two".