1143311425 has 12 divisors (see below), whose sum is σ = 1447871616. Its totient is φ = 895187600.

The previous prime is 1143311423. The next prime is 1143311431. The reversal of 1143311425 is 5241133411.

It is not a de Polignac number, because 1143311425 - 2¹ = 1143311423 is a prime.

It is a super-2 number, since 2×1143311425² = 2614322029071061250, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1143311425.

It is not an unprimeable number, because it can be changed into a prime (1143311423) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 485341 + ... + 487690.

It is an arithmetic number, because the mean of its divisors is an integer number (120655968).

Almost surely, 2^1143311425 is an apocalyptic number.

It is an amenable number.

1143311425 is a deficient number, since it is larger than the sum of its proper divisors (304560191).

1143311425 is an equidigital number, since it uses as much as digits as its factorization.

1143311425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 973088 (or 973083 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 1143311425 is about 33812.8884450885. Note that the first 3 decimals coincide. The cubic root of 1143311425 is about 1045.6544285684.

Adding to 1143311425 its reverse (5241133411), we get a palindrome (6384444836).

The spelling of 1143311425 in words is "one billion, one hundred forty-three million, three hundred eleven thousand, four hundred twenty-five".