1403256 has 32 divisors (see below), whose sum is σ = 3571200. Its totient is φ = 459360.

The previous prime is 1403251. The next prime is 1403257. The reversal of 1403256 is 6523041.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1403251) 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 in 7 ways as a sum of consecutive naturals, for example, 921 + ... + 1911.

It is an arithmetic number, because the mean of its divisors is an integer number (111600).

2^1403256 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1403256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1785600).

1403256 is an abundant number, since it is smaller than the sum of its proper divisors (2167944).

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

1403256 is a wasteful number, since it uses less digits than its factorization.

1403256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059 (or 1055 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1403256 is about 1184.5910686815. The cubic root of 1403256 is about 111.9555520908.

Adding to 1403256 its reverse (6523041), we get a palindrome (7926297).

The spelling of 1403256 in words is "one million, four hundred three thousand, two hundred fifty-six".