1207989 has 12 divisors (see below), whose sum is σ = 1768000. Its totient is φ = 794664.

The previous prime is 1207981. The next prime is 1208017. The reversal of 1207989 is 9897021.

It is a happy number.

It is not a de Polignac number, because 1207989 - 2³ = 1207981 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1207981) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 139 + ... + 1560.

2^1207989 is an apocalyptic number.

It is an amenable number.

1207989 is a deficient number, since it is larger than the sum of its proper divisors (560011).

1207989 is a wasteful number, since it uses less digits than its factorization.

1207989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784 (or 1781 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 1207989 is about 1099.0855289740. The cubic root of 1207989 is about 106.5011571652.

The spelling of 1207989 in words is "one million, two hundred seven thousand, nine hundred eighty-nine".