1289473 has 4 divisors (see below), whose sum is σ = 1357360. Its totient is φ = 1221588.

The previous prime is 1289459. The next prime is 1289513. The reversal of 1289473 is 3749821.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3749821 = 19 ⋅197359.

It is a cyclic number.

It is not a de Polignac number, because 1289473 - 2¹³ = 1281281 is a prime.

1289473 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1289423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33915 + ... + 33952.

It is an arithmetic number, because the mean of its divisors is an integer number (339340).

2^1289473 is an apocalyptic number.

It is an amenable number.

1289473 is a deficient number, since it is larger than the sum of its proper divisors (67887).

1289473 is an equidigital number, since it uses as much as digits as its factorization.

1289473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67886.

The product of its digits is 12096, while the sum is 34.

The square root of 1289473 is about 1135.5496466469. The cubic root of 1289473 is about 108.8438974122.

The spelling of 1289473 in words is "one million, two hundred eighty-nine thousand, four hundred seventy-three".