1444121135 has 4 divisors (see below), whose sum is σ = 1732945368. Its totient is φ = 1155296904.

The previous prime is 1444121131. The next prime is 1444121141. The reversal of 1444121135 is 5311214441.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1444121135 - 2² = 1444121131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1444121131) 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, 144412109 + ... + 144412118.

It is an arithmetic number, because the mean of its divisors is an integer number (433236342).

Almost surely, 2^1444121135 is an apocalyptic number.

1444121135 is a deficient number, since it is larger than the sum of its proper divisors (288824233).

1444121135 is an equidigital number, since it uses as much as digits as its factorization.

1444121135 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288824232.

The product of its digits is 1920, while the sum is 26.

The square root of 1444121135 is about 38001.5938481533. The cubic root of 1444121135 is about 1130.3194687611.

Adding to 1444121135 its reverse (5311214441), we get a palindrome (6755335576).

The spelling of 1444121135 in words is "one billion, four hundred forty-four million, one hundred twenty-one thousand, one hundred thirty-five".