1244404465 has 8 divisors (see below), whose sum is σ = 1497291048. Its totient is φ = 992853120.

The previous prime is 1244404423. The next prime is 1244404493. The reversal of 1244404465 is 5644044421.

It can be written as a sum of positive squares in 4 ways, for example, as 46621584 + 1197782881 = 6828^2 + 34609^2 .

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

It is not a de Polignac number, because 1244404465 - 2²³ = 1236015857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1244404465.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 331756 + ... + 335485.

It is an arithmetic number, because the mean of its divisors is an integer number (187161381).

Almost surely, 2^1244404465 is an apocalyptic number.

It is an amenable number.

1244404465 is a deficient number, since it is larger than the sum of its proper divisors (252886583).

1244404465 is an equidigital number, since it uses as much as digits as its factorization.

1244404465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 667619.

The product of its (nonzero) digits is 61440, while the sum is 34.

The square root of 1244404465 is about 35276.1174876148. The cubic root of 1244404465 is about 1075.6075786583.

Adding to 1244404465 its reverse (5644044421), we get a palindrome (6888448886).

The spelling of 1244404465 in words is "one billion, two hundred forty-four million, four hundred four thousand, four hundred sixty-five".