100012855 has 32 divisors (see below), whose sum is σ = 130170240. Its totient is φ = 73582080.

The previous prime is 100012837. The next prime is 100012859. The reversal of 100012855 is 558210001.

It is not a de Polignac number, because 100012855 - 2¹⁵ = 99980087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100012859) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 371661 + ... + 371929.

It is an arithmetic number, because the mean of its divisors is an integer number (4067820).

Almost surely, 2^100012855 is an apocalyptic number.

100012855 is a deficient number, since it is larger than the sum of its proper divisors (30157385).

100012855 is a wasteful number, since it uses less digits than its factorization.

100012855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 411.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 100012855 is about 10000.6427293449. The cubic root of 100012855 is about 464.1787717172.

Adding to 100012855 its reverse (558210001), we get a palindrome (658222856).

The spelling of 100012855 in words is "one hundred million, twelve thousand, eight hundred fifty-five".