1144301561 has 4 divisors (see below), whose sum is σ = 1232324772. Its totient is φ = 1056278352.

The previous prime is 1144301539. The next prime is 1144301567. The reversal of 1144301561 is 1651034411.

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

It can be written as a sum of positive squares in 2 ways, for example, as 747694336 + 396607225 = 27344^2 + 19915^2 .

It is a cyclic number.

It is not a de Polignac number, because 1144301561 - 2¹⁸ = 1144039417 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 1144301561.

It is not an unprimeable number, because it can be changed into a prime (1144301567) 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, 44011586 + ... + 44011611.

It is an arithmetic number, because the mean of its divisors is an integer number (308081193).

Almost surely, 2^1144301561 is an apocalyptic number.

It is an amenable number.

1144301561 is a deficient number, since it is larger than the sum of its proper divisors (88023211).

1144301561 is an equidigital number, since it uses as much as digits as its factorization.

1144301561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88023210.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 1144301561 is about 33827.5266757710. The cubic root of 1144301561 is about 1045.9561956803.

Adding to 1144301561 its reverse (1651034411), we get a palindrome (2795335972).

The spelling of 1144301561 in words is "one billion, one hundred forty-four million, three hundred one thousand, five hundred sixty-one".