1305201287 has 8 divisors (see below), whose sum is σ = 1421395920. Its totient is φ = 1191263040.

The previous prime is 1305201281. The next prime is 1305201353. The reversal of 1305201287 is 7821025031.

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

It is a cyclic number.

It is not a de Polignac number, because 1305201287 - 2²⁸ = 1036765831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305201281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 562889 + ... + 565202.

It is an arithmetic number, because the mean of its divisors is an integer number (177674490).

Almost surely, 2^1305201287 is an apocalyptic number.

1305201287 is a deficient number, since it is larger than the sum of its proper divisors (116194633).

1305201287 is a wasteful number, since it uses less digits than its factorization.

1305201287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128193.

The product of its (nonzero) digits is 3360, while the sum is 29.

The square root of 1305201287 is about 36127.5696248724. The cubic root of 1305201287 is about 1092.8464968203.

The spelling of 1305201287 in words is "one billion, three hundred five million, two hundred one thousand, two hundred eighty-seven".