100002556 has 24 divisors (see below), whose sum is σ = 181429920. Its totient is φ = 48172992.

The previous prime is 100002541. The next prime is 100002569. The reversal of 100002556 is 655200001.

It is a happy number.

It is a super-2 number, since 2×100002556² = 20001022413066272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 101241 + ... + 102223.

It is an arithmetic number, because the mean of its divisors is an integer number (7559580).

Almost surely, 2^100002556 is an apocalyptic number.

It is an amenable number.

100002556 is a deficient number, since it is larger than the sum of its proper divisors (81427364).

100002556 is a wasteful number, since it uses less digits than its factorization.

100002556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1893 (or 1891 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 19.

The square root of 100002556 is about 10000.1277991834. The cubic root of 100002556 is about 464.1628379613.

Adding to 100002556 its reverse (655200001), we get a palindrome (755202557).

The spelling of 100002556 in words is "one hundred million, two thousand, five hundred fifty-six".