1143634257 has 12 divisors (see below), whose sum is σ = 1672827520. Its totient is φ = 752771448.

The previous prime is 1143634253. The next prime is 1143634259. The reversal of 1143634257 is 7524363411.

1143634257 is a `hidden beast` number, since 1 + 14 + 3 + 634 + 2 + 5 + 7 = 666.

It is not a de Polignac number, because 1143634257 - 2² = 1143634253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1143634253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 803533 + ... + 804954.

Almost surely, 2^1143634257 is an apocalyptic number.

It is an amenable number.

1143634257 is a deficient number, since it is larger than the sum of its proper divisors (529193263).

1143634257 is a wasteful number, since it uses less digits than its factorization.

1143634257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1608572 (or 1608569 counting only the distinct ones).

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

The square root of 1143634257 is about 33817.6619091267. The cubic root of 1143634257 is about 1045.7528383091.

Adding to 1143634257 its reverse (7524363411), we get a palindrome (8667997668).

The spelling of 1143634257 in words is "one billion, one hundred forty-three million, six hundred thirty-four thousand, two hundred fifty-seven".