1200987 has 10 divisors (see below), whose sum is σ = 1794188. Its totient is φ = 800604.

The previous prime is 1200959. The next prime is 1200989. The reversal of 1200987 is 7890021.

It is not a de Polignac number, because 1200987 - 2¹² = 1196891 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1200987.

It is not an unprimeable number, because it can be changed into a prime (1200989) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 7333 + ... + 7494.

2^1200987 is an apocalyptic number.

1200987 is a deficient number, since it is larger than the sum of its proper divisors (593201).

1200987 is an equidigital number, since it uses as much as digits as its factorization.

1200987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14839 (or 14830 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 1200987 is about 1095.8955242175. The cubic root of 1200987 is about 106.2949834900.

It can be divided in two parts, 1200 and 987, that added together give a 7-th power (2187 = 3⁷).

The spelling of 1200987 in words is "one million, two hundred thousand, nine hundred eighty-seven".