1251089 has 8 divisors (see below), whose sum is σ = 1479360. Its totient is φ = 1035216.

The previous prime is 1251083. The next prime is 1251097. The reversal of 1251089 is 9801521.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-1251089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1251083) 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, 2879 + ... + 3284.

It is an arithmetic number, because the mean of its divisors is an integer number (184920).

2^1251089 is an apocalyptic number.

It is an amenable number.

1251089 is a deficient number, since it is larger than the sum of its proper divisors (228271).

1251089 is an equidigital number, since it uses as much as digits as its factorization.

1251089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6199.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 1251089 is about 1118.5208983296. The cubic root of 1251089 is about 107.7530078133.

The spelling of 1251089 in words is "one million, two hundred fifty-one thousand, eighty-nine".