1444540253 has 8 divisors (see below), whose sum is σ = 1588758528. Its totient is φ = 1305050544.

The previous prime is 1444540241. The next prime is 1444540271. The reversal of 1444540253 is 3520454441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1444540253 - 2²⁰ = 1443491677 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 (1444540213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1181501 + ... + 1182722.

It is an arithmetic number, because the mean of its divisors is an integer number (198594816).

Almost surely, 2^1444540253 is an apocalyptic number.

1444540253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1444540253 is a deficient number, since it is larger than the sum of its proper divisors (144218275).

1444540253 is a wasteful number, since it uses less digits than its factorization.

1444540253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2364283.

The product of its (nonzero) digits is 38400, while the sum is 32.

The square root of 1444540253 is about 38007.1079273338. The cubic root of 1444540253 is about 1130.4288066370.

Adding to 1444540253 its reverse (3520454441), we get a palindrome (4964994694).

The spelling of 1444540253 in words is "one billion, four hundred forty-four million, five hundred forty thousand, two hundred fifty-three".