1002256403 has 8 divisors (see below), whose sum is σ = 1117066320. Its totient is φ = 893652480.

The previous prime is 1002256391. The next prime is 1002256421. The reversal of 1002256403 is 3046522001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1002256403 - 2¹⁶ = 1002190867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1002256483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1551158 + ... + 1551803.

It is an arithmetic number, because the mean of its divisors is an integer number (139633290).

Almost surely, 2^1002256403 is an apocalyptic number.

1002256403 is a deficient number, since it is larger than the sum of its proper divisors (114809917).

1002256403 is a wasteful number, since it uses less digits than its factorization.

1002256403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3102997.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1002256403 is about 31658.4333630077. The cubic root of 1002256403 is about 1000.7515693354.

Adding to 1002256403 its reverse (3046522001), we get a palindrome (4048778404).

The spelling of 1002256403 in words is "one billion, two million, two hundred fifty-six thousand, four hundred three".