1143657 has 12 divisors (see below), whose sum is σ = 1672944. Its totient is φ = 752760.

The previous prime is 1143647. The next prime is 1143661. The reversal of 1143657 is 7563411.

1143657 is a `hidden beast` number, since 1 + 1 + 4 + 3 + 657 = 666.

It is not a de Polignac number, because 1143657 - 2⁷ = 1143529 is a prime.

It is a Smith number, since the sum of its digits (27) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1143657.

It is not an unprimeable number, because it can be changed into a prime (1143647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19 + ... + 1512.

It is an arithmetic number, because the mean of its divisors is an integer number (139412).

2^1143657 is an apocalyptic number.

It is an amenable number.

1143657 is a deficient number, since it is larger than the sum of its proper divisors (529287).

1143657 is a wasteful number, since it uses less digits than its factorization.

1143657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620 (or 1617 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 1143657 is about 1069.4190011403. The cubic root of 1143657 is about 104.5759770420.

The spelling of 1143657 in words is "one million, one hundred forty-three thousand, six hundred fifty-seven".