1144020135 has 16 divisors (see below), whose sum is σ = 1832463360. Its totient is φ = 609467040.

The previous prime is 1144020113. The next prime is 1144020181. The reversal of 1144020135 is 5310204411.

It is not a de Polignac number, because 1144020135 - 2¹⁰ = 1144019111 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 28195 + ... + 55524.

It is an arithmetic number, because the mean of its divisors is an integer number (114528960).

Almost surely, 2^1144020135 is an apocalyptic number.

1144020135 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1144020135 is a deficient number, since it is larger than the sum of its proper divisors (688443225).

1144020135 is an equidigital number, since it uses as much as digits as its factorization.

1144020135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84638.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1144020135 is about 33823.3667011432. The cubic root of 1144020135 is about 1045.8704422353.

Adding to 1144020135 its reverse (5310204411), we get a palindrome (6454224546).

The spelling of 1144020135 in words is "one billion, one hundred forty-four million, twenty thousand, one hundred thirty-five".