1289924 has 12 divisors (see below), whose sum is σ = 2265900. Its totient is φ = 642528.

The previous prime is 1289921. The next prime is 1289927. The reversal of 1289924 is 4299821.

It is an interprime number because it is at equal distance from previous prime (1289921) and next prime (1289927).

It can be written as a sum of positive squares in 2 ways, for example, as 515524 + 774400 = 718^2 + 880^2 .

It is not an unprimeable number, because it can be changed into a prime (1289921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1142 + ... + 1970.

It is an arithmetic number, because the mean of its divisors is an integer number (188825).

2^1289924 is an apocalyptic number.

It is an amenable number.

1289924 is a deficient number, since it is larger than the sum of its proper divisors (975976).

1289924 is a wasteful number, since it uses less digits than its factorization.

1289924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1222 (or 1220 counting only the distinct ones).

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

The square root of 1289924 is about 1135.7482115328. The cubic root of 1289924 is about 108.8565855093.

The spelling of 1289924 in words is "one million, two hundred eighty-nine thousand, nine hundred twenty-four".