1630256 has 10 divisors (see below), whose sum is σ = 3158652. Its totient is φ = 815120.

The previous prime is 1630253. The next prime is 1630261. The reversal of 1630256 is 6520361.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (1630253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50930 + ... + 50961.

2^1630256 is an apocalyptic number.

1630256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1630256 is a deficient number, since it is larger than the sum of its proper divisors (1528396).

1630256 is a wasteful number, since it uses less digits than its factorization.

1630256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101899 (or 101893 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 1630256 is about 1276.8147868818. The cubic root of 1630256 is about 117.6933529965.

The spelling of 1630256 in words is "one million, six hundred thirty thousand, two hundred fifty-six".