1145681 has 8 divisors (see below), whose sum is σ = 1277280. Its totient is φ = 1021248.

The previous prime is 1145659. The next prime is 1145689. The reversal of 1145681 is 1865411.

1145681 is nontrivially palindromic in base 4.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1145681 - 2¹⁰ = 1144657 is a prime.

It is a super-2 number, since 2×1145681² = 2625169907522, which contains 22 as substring.

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 1145681.

It is not an unprimeable number, because it can be changed into a prime (1145689) 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 7 ways as a sum of consecutive naturals, for example, 1451 + ... + 2096.

It is an arithmetic number, because the mean of its divisors is an integer number (159660).

2^1145681 is an apocalyptic number.

It is an amenable number.

1145681 is a deficient number, since it is larger than the sum of its proper divisors (131599).

1145681 is a wasteful number, since it uses less digits than its factorization.

1145681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3583.

The product of its digits is 960, while the sum is 26.

The square root of 1145681 is about 1070.3648910535. The cubic root of 1145681 is about 104.6376321934.

The spelling of 1145681 in words is "one million, one hundred forty-five thousand, six hundred eighty-one".