1287662 has 8 divisors (see below), whose sum is σ = 1955016. Its totient is φ = 635992.

The previous prime is 1287661. The next prime is 1287683. The reversal of 1287662 is 2667821.

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

It is a nialpdrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1287661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3713 + ... + 4044.

It is an arithmetic number, because the mean of its divisors is an integer number (244377).

2^1287662 is an apocalyptic number.

1287662 is a deficient number, since it is larger than the sum of its proper divisors (667354).

1287662 is an equidigital number, since it uses as much as digits as its factorization.

1287662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7842.

The product of its digits is 8064, while the sum is 32.

The square root of 1287662 is about 1134.7519552748. The cubic root of 1287662 is about 108.7929182783.

The spelling of 1287662 in words is "one million, two hundred eighty-seven thousand, six hundred sixty-two".