1287330553 has 6 divisors (see below), whose sum is σ = 1300959114. Its totient is φ = 1273709376.

The previous prime is 1287330533. The next prime is 1287330571. The reversal of 1287330553 is 3550337821.

It can be written as a sum of positive squares in only one way, i.e., 1074987369 + 212343184 = 32787^2 + 14572^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1287330553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1287330523) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 351550 + ... + 355192.

It is an arithmetic number, because the mean of its divisors is an integer number (216826519).

Almost surely, 2^1287330553 is an apocalyptic number.

It is an amenable number.

1287330553 is a deficient number, since it is larger than the sum of its proper divisors (13628561).

1287330553 is an frugal number, since it uses more digits than its factorization.

1287330553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7383 (or 3740 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 37.

The square root of 1287330553 is about 35879.3889719432. The cubic root of 1287330553 is about 1087.8358296595.

The spelling of 1287330553 in words is "one billion, two hundred eighty-seven million, three hundred thirty thousand, five hundred fifty-three".