1444721542 has 16 divisors (see below), whose sum is σ = 2367943632. Its totient is φ = 655621120.

The previous prime is 1444721539. The next prime is 1444721543. The reversal of 1444721542 is 2451274441.

It is a junction number, because it is equal to n+sod(n) for n = 1444721498 and 1444721507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1444721543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39643 + ... + 66790.

It is an arithmetic number, because the mean of its divisors is an integer number (147996477).

Almost surely, 2^1444721542 is an apocalyptic number.

1444721542 is a deficient number, since it is larger than the sum of its proper divisors (923222090).

1444721542 is a wasteful number, since it uses less digits than its factorization.

1444721542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107063.

The product of its digits is 35840, while the sum is 34.

The square root of 1444721542 is about 38009.4927879865. The cubic root of 1444721542 is about 1130.4760940548.

Adding to 1444721542 its reverse (2451274441), we get a palindrome (3895995983).

The spelling of 1444721542 in words is "one billion, four hundred forty-four million, seven hundred twenty-one thousand, five hundred forty-two".