1224989 has 8 divisors (see below), whose sum is σ = 1292760. Its totient is φ = 1158976.

The previous prime is 1224983. The next prime is 1224991. The reversal of 1224989 is 9894221.

It can be written as a sum of positive squares in 4 ways, for example, as 293764 + 931225 = 542^2 + 965^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1224989 - 2⁴ = 1224973 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 (1224983) 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, 1139 + ... + 1935.

It is an arithmetic number, because the mean of its divisors is an integer number (161595).

2^1224989 is an apocalyptic number.

It is an amenable number.

1224989 is a deficient number, since it is larger than the sum of its proper divisors (67771).

1224989 is an equidigital number, since it uses as much as digits as its factorization.

1224989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879.

The product of its digits is 10368, while the sum is 35.

The square root of 1224989 is about 1106.7922117543. The cubic root of 1224989 is about 106.9984277872.

The spelling of 1224989 in words is "one million, two hundred twenty-four thousand, nine hundred eighty-nine".