1287950 has 12 divisors (see below), whose sum is σ = 2395680. Its totient is φ = 515160.

The previous prime is 1287947. The next prime is 1287961. The reversal of 1287950 is 597821.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12830 + ... + 12929.

It is an arithmetic number, because the mean of its divisors is an integer number (199640).

2^1287950 is an apocalyptic number.

1287950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1287950 is a deficient number, since it is larger than the sum of its proper divisors (1107730).

1287950 is a wasteful number, since it uses less digits than its factorization.

1287950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25771 (or 25766 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 1287950 is about 1134.8788481596. The cubic root of 1287950 is about 108.8010285911.

The spelling of 1287950 in words is "one million, two hundred eighty-seven thousand, nine hundred fifty".