1144145 has 4 divisors (see below), whose sum is σ = 1372980. Its totient is φ = 915312.

The previous prime is 1144141. The next prime is 1144147. The reversal of 1144145 is 5414411.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5414411 = 19 ⋅284969.

It can be written as a sum of positive squares in 2 ways, for example, as 253009 + 891136 = 503^2 + 944^2 .

It is a cyclic number.

It is not a de Polignac number, because 1144145 - 2² = 1144141 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1144141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 114410 + ... + 114419.

It is an arithmetic number, because the mean of its divisors is an integer number (343245).

2^1144145 is an apocalyptic number.

It is an amenable number.

1144145 is a deficient number, since it is larger than the sum of its proper divisors (228835).

1144145 is an equidigital number, since it uses as much as digits as its factorization.

1144145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228834.

The product of its digits is 320, while the sum is 20.

The square root of 1144145 is about 1069.6471380787. The cubic root of 1144145 is about 104.5908491642.

Adding to 1144145 its reverse (5414411), we get a palindrome (6558556).

The spelling of 1144145 in words is "one million, one hundred forty-four thousand, one hundred forty-five".