1144021155 has 16 divisors (see below), whose sum is σ = 1875079584. Its totient is φ = 595262720.

The previous prime is 1144021133. The next prime is 1144021157. The reversal of 1144021155 is 5511204411.

It is not a de Polignac number, because 1144021155 - 2⁹ = 1144020643 is a prime.

It is a super-3 number, since 3×1144021155³ (a number of 28 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1144021157) 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, 929484 + ... + 930713.

It is an arithmetic number, because the mean of its divisors is an integer number (117192474).

Almost surely, 2^1144021155 is an apocalyptic number.

1144021155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1144021155 is a deficient number, since it is larger than the sum of its proper divisors (731058429).

1144021155 is a wasteful number, since it uses less digits than its factorization.

1144021155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1860246.

The product of its (nonzero) digits is 800, while the sum is 24.

The square root of 1144021155 is about 33823.3817794732. The cubic root of 1144021155 is about 1045.8707530654.

Adding to 1144021155 its reverse (5511204411), we get a palindrome (6655225566).

The spelling of 1144021155 in words is "one billion, one hundred forty-four million, twenty-one thousand, one hundred fifty-five".