1285470 has 72 divisors (see below), whose sum is σ = 3623256. Its totient is φ = 327888.

The previous prime is 1285469. The next prime is 1285481. The reversal of 1285470 is 745821.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 55879 + ... + 55901.

It is an arithmetic number, because the mean of its divisors is an integer number (50323).

2^1285470 is an apocalyptic number.

1285470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1285470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1811628).

1285470 is an abundant number, since it is smaller than the sum of its proper divisors (2337786).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1285470 is an equidigital number, since it uses as much as digits as its factorization.

1285470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68 (or 33 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 1285470 is about 1133.7856940357. The cubic root of 1285470 is about 108.7311501217.

The spelling of 1285470 in words is "one million, two hundred eighty-five thousand, four hundred seventy".