1144001271 has 16 divisors (see below), whose sum is σ = 1747600128. Its totient is φ = 652080000.

The previous prime is 1144001249. The next prime is 1144001273. The reversal of 1144001271 is 1721004411.

It is not a de Polignac number, because 1144001271 - 2⁵ = 1144001239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144001273) 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 15 ways as a sum of consecutive naturals, for example, 59505 + ... + 76346.

It is an arithmetic number, because the mean of its divisors is an integer number (109225008).

Almost surely, 2^1144001271 is an apocalyptic number.

1144001271 is a deficient number, since it is larger than the sum of its proper divisors (603598857).

1144001271 is a wasteful number, since it uses less digits than its factorization.

1144001271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136262.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 1144001271 is about 33823.0878395217. The cubic root of 1144001271 is about 1045.8646936743.

Adding to 1144001271 its reverse (1721004411), we get a palindrome (2865005682).

The spelling of 1144001271 in words is "one billion, one hundred forty-four million, one thousand, two hundred seventy-one".