1144155005 has 32 divisors (see below), whose sum is σ = 1584161280. Its totient is φ = 777093120.

The previous prime is 1144154993. The next prime is 1144155007. The reversal of 1144155005 is 5005514411.

It is not a de Polignac number, because 1144155005 - 2¹⁸ = 1143892861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1144155007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2797241 + ... + 2797649.

It is an arithmetic number, because the mean of its divisors is an integer number (49505040).

Almost surely, 2^1144155005 is an apocalyptic number.

It is an amenable number.

1144155005 is a deficient number, since it is larger than the sum of its proper divisors (440006275).

1144155005 is a wasteful number, since it uses less digits than its factorization.

1144155005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 989.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 1144155005 is about 33825.3603824113. The cubic root of 1144155005 is about 1045.9115402893.

Adding to 1144155005 its reverse (5005514411), we get a palindrome (6149669416).

The spelling of 1144155005 in words is "one billion, one hundred forty-four million, one hundred fifty-five thousand, five".