1249989 has 8 divisors (see below), whose sum is σ = 1794912. Its totient is φ = 769200.

The previous prime is 1249943. The next prime is 1249999. The reversal of 1249989 is 9899421.

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

It is not a de Polignac number, because 1249989 - 2⁷ = 1249861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1249989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1249939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15987 + ... + 16064.

It is an arithmetic number, because the mean of its divisors is an integer number (224364).

2^1249989 is an apocalyptic number.

It is an amenable number.

1249989 is a deficient number, since it is larger than the sum of its proper divisors (544923).

1249989 is a wasteful number, since it uses less digits than its factorization.

1249989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32067.

The product of its digits is 46656, while the sum is 42.

The square root of 1249989 is about 1118.0290693895. The cubic root of 1249989 is about 107.7214185169.

The spelling of 1249989 in words is "one million, two hundred forty-nine thousand, nine hundred eighty-nine".