1287421346 has 16 divisors (see below), whose sum is σ = 1960113600. Its totient is φ = 634114800.

The previous prime is 1287421307. The next prime is 1287421363. The reversal of 1287421346 is 6431247821.

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 24185 + ... + 56211.

It is an arithmetic number, because the mean of its divisors is an integer number (122507100).

Almost surely, 2^1287421346 is an apocalyptic number.

1287421346 is a deficient number, since it is larger than the sum of its proper divisors (672692254).

1287421346 is a wasteful number, since it uses less digits than its factorization.

1287421346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32329.

The product of its digits is 64512, while the sum is 38.

The square root of 1287421346 is about 35880.6542025086. The cubic root of 1287421346 is about 1087.8614033959.

The spelling of 1287421346 in words is "one billion, two hundred eighty-seven million, four hundred twenty-one thousand, three hundred forty-six".