1256485 has 4 divisors (see below), whose sum is σ = 1507788. Its totient is φ = 1005184.

The previous prime is 1256477. The next prime is 1256531. The reversal of 1256485 is 5846521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5846521 = 17 ⋅343913.

It can be written as a sum of positive squares in 2 ways, for example, as 367236 + 889249 = 606^2 + 943^2 .

It is a cyclic number.

It is not a de Polignac number, because 1256485 - 2³ = 1256477 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

1256485 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125644 + ... + 125653.

It is an arithmetic number, because the mean of its divisors is an integer number (376947).

2^1256485 is an apocalyptic number.

It is an amenable number.

1256485 is a deficient number, since it is larger than the sum of its proper divisors (251303).

1256485 is an equidigital number, since it uses as much as digits as its factorization.

1256485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 251302.

The product of its digits is 9600, while the sum is 31.

The square root of 1256485 is about 1120.9304171089. The cubic root of 1256485 is about 107.9077000612.

The spelling of 1256485 in words is "one million, two hundred fifty-six thousand, four hundred eighty-five".