1143647325 has 36 divisors (see below), whose sum is σ = 2052229140. Its totient is φ = 608805120.

The previous prime is 1143647291. The next prime is 1143647353. The reversal of 1143647325 is 5237463411.

1143647325 is a `hidden beast` number, since 1 + 1 + 4 + 3 + 647 + 3 + 2 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 219365721 + 924281604 = 14811^2 + 30402^2 .

It is not a de Polignac number, because 1143647325 - 2⁶ = 1143647261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1143647325.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 123559 + ... + 132491.

It is an arithmetic number, because the mean of its divisors is an integer number (57006365).

Almost surely, 2^1143647325 is an apocalyptic number.

1143647325 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1143647325 is a deficient number, since it is larger than the sum of its proper divisors (908581815).

1143647325 is a wasteful number, since it uses less digits than its factorization.

1143647325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9518 (or 9510 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 1143647325 is about 33817.8551212226. The cubic root of 1143647325 is about 1045.7568214724.

The spelling of 1143647325 in words is "one billion, one hundred forty-three million, six hundred forty-seven thousand, three hundred twenty-five".