1405256 has 16 divisors (see below), whose sum is σ = 2648700. Its totient is φ = 698944.

The previous prime is 1405249. The next prime is 1405267. The reversal of 1405256 is 6525041.

It can be written as a sum of positive squares in 2 ways, for example, as 1188100 + 217156 = 1090^2 + 466^2 .

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, 1826 + ... + 2478.

2^1405256 is an apocalyptic number.

It is an amenable number.

1405256 is a deficient number, since it is larger than the sum of its proper divisors (1243444).

1405256 is a wasteful number, since it uses less digits than its factorization.

1405256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 928 (or 924 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 1405256 is about 1185.4349412768. The cubic root of 1405256 is about 112.0087153082.

It can be divided in two parts, 1405 and 256, that added together give a palindrome (1661).

The spelling of 1405256 in words is "one million, four hundred five thousand, two hundred fifty-six".