1478289 has 4 divisors (see below), whose sum is σ = 1971056. Its totient is φ = 985524.

The previous prime is 1478287. The next prime is 1478293. The reversal of 1478289 is 9828741.

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.

It is not a de Polignac number, because 1478289 - 2¹ = 1478287 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1478287) 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, 246379 + ... + 246384.

It is an arithmetic number, because the mean of its divisors is an integer number (492764).

2^1478289 is an apocalyptic number.

It is an amenable number.

1478289 is a deficient number, since it is larger than the sum of its proper divisors (492767).

1478289 is an equidigital number, since it uses as much as digits as its factorization.

1478289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492766.

The product of its digits is 32256, while the sum is 39.

The square root of 1478289 is about 1215.8490860300. The cubic root of 1478289 is about 113.9164515570.

The spelling of 1478289 in words is "one million, four hundred seventy-eight thousand, two hundred eighty-nine".