1420256 has 12 divisors (see below), whose sum is σ = 2796192. Its totient is φ = 710112.

The previous prime is 1420253. The next prime is 1420259. The reversal of 1420256 is 6520241.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1420253) and next prime (1420259).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1420253) 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 as a sum of consecutive naturals, namely, 22160 + ... + 22223.

It is an arithmetic number, because the mean of its divisors is an integer number (233016).

2^1420256 is an apocalyptic number.

1420256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1420256 is a deficient number, since it is larger than the sum of its proper divisors (1375936).

1420256 is an equidigital number, since it uses as much as digits as its factorization.

1420256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44393 (or 44385 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 1420256 is about 1191.7449391543. The cubic root of 1420256 is about 112.4058405547.

Adding to 1420256 its reverse (6520241), we get a palindrome (7940497).

The spelling of 1420256 in words is "one million, four hundred twenty thousand, two hundred fifty-six".