1285478 has 4 divisors (see below), whose sum is σ = 1928220. Its totient is φ = 642738.

The previous prime is 1285469. The next prime is 1285481. The reversal of 1285478 is 8745821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8745821 = 7 ⋅1249403.

It is a Curzon number.

It is a plaindrome in base 14.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 321368 + ... + 321371.

It is an arithmetic number, because the mean of its divisors is an integer number (482055).

2^1285478 is an apocalyptic number.

1285478 is a deficient number, since it is larger than the sum of its proper divisors (642742).

1285478 is an equidigital number, since it uses as much as digits as its factorization.

1285478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642741.

The product of its digits is 17920, while the sum is 35.

The square root of 1285478 is about 1133.7892220338. The cubic root of 1285478 is about 108.7313756806.

The spelling of 1285478 in words is "one million, two hundred eighty-five thousand, four hundred seventy-eight".