1287213310 has 32 divisors (see below), whose sum is σ = 2532425472. Its totient is φ = 468963840.

The previous prime is 1287213289. The next prime is 1287213329. The reversal of 1287213310 is 133127821.

It is a super-2 number, since 2×1287213310² = 3313836210882312200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 116857 + ... + 127396.

It is an arithmetic number, because the mean of its divisors is an integer number (79138296).

Almost surely, 2^1287213310 is an apocalyptic number.

1287213310 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1287213310 is a deficient number, since it is larger than the sum of its proper divisors (1245212162).

1287213310 is a wasteful number, since it uses less digits than its factorization.

1287213310 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244308.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 1287213310 is about 35877.7550858467. The cubic root of 1287213310 is about 1087.8028039517.

The spelling of 1287213310 in words is "one billion, two hundred eighty-seven million, two hundred thirteen thousand, three hundred ten".