1244989 has 2 divisors, whose sum is σ = 1244990. Its totient is φ = 1244988.

The previous prime is 1244987. The next prime is 1244993. The reversal of 1244989 is 9894421.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1243225 + 1764 = 1115^2 + 42^2 .

It is a cyclic number.

It is not a de Polignac number, because 1244989 - 2¹ = 1244987 is a prime.

It is a super-2 number, since 2×1244989² = 3099995220242, which contains 22 as substring.

Together with 1244987, it forms a pair of twin primes.

It is an Ulam number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1244987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 622494 + 622495.

It is an arithmetic number, because the mean of its divisors is an integer number (622495).

2^1244989 is an apocalyptic number.

It is an amenable number.

1244989 is a deficient number, since it is larger than the sum of its proper divisors (1).

1244989 is an equidigital number, since it uses as much as digits as its factorization.

1244989 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 37.

The square root of 1244989 is about 1115.7907509923. The cubic root of 1244989 is about 107.5775967601.

The spelling of 1244989 in words is "one million, two hundred forty-four thousand, nine hundred eighty-nine".