1144720487 has 2 divisors, whose sum is σ = 1144720488. Its totient is φ = 1144720486.

The previous prime is 1144720481. The next prime is 1144720523. The reversal of 1144720487 is 7840274411.

It is a weak prime.

It is an emirp because it is prime and its reverse (7840274411) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1144720487 - 2⁸ = 1144720231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1144720487.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1144720481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 572360243 + 572360244.

It is an arithmetic number, because the mean of its divisors is an integer number (572360244).

Almost surely, 2^1144720487 is an apocalyptic number.

1144720487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1144720487 is an equidigital number, since it uses as much as digits as its factorization.

1144720487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50176, while the sum is 38.

The square root of 1144720487 is about 33833.7181964974. The cubic root of 1144720487 is about 1046.0838207747.

Adding to 1144720487 its reverse (7840274411), we get a palindrome (8984994898).

The spelling of 1144720487 in words is "one billion, one hundred forty-four million, seven hundred twenty thousand, four hundred eighty-seven".