1149865457 has 16 divisors (see below), whose sum is σ = 1300165440. Its totient is φ = 1009495872.

The previous prime is 1149865447. The next prime is 1149865477. The reversal of 1149865457 is 7545689411.

It is a cyclic number.

It is not a de Polignac number, because 1149865457 - 2¹⁰ = 1149864433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1149865447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2498 + ... + 48020.

It is an arithmetic number, because the mean of its divisors is an integer number (81260340).

Almost surely, 2^1149865457 is an apocalyptic number.

It is an amenable number.

1149865457 is a deficient number, since it is larger than the sum of its proper divisors (150299983).

1149865457 is a wasteful number, since it uses less digits than its factorization.

1149865457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45632.

The product of its digits is 1209600, while the sum is 50.

The square root of 1149865457 is about 33909.6661292912. Note that the first 3 decimals coincide. The cubic root of 1149865457 is about 1047.6486938113.

The spelling of 1149865457 in words is "one billion, one hundred forty-nine million, eight hundred sixty-five thousand, four hundred fifty-seven".