100012842 has 24 divisors (see below), whose sum is σ = 219308544. Its totient is φ = 32935464.

The previous prime is 100012837. The next prime is 100012859. The reversal of 100012842 is 248210001.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 31978 + ... + 34965.

It is an arithmetic number, because the mean of its divisors is an integer number (9137856).

Almost surely, 2^100012842 is an apocalyptic number.

100012842 is an abundant number, since it is smaller than the sum of its proper divisors (119295702).

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

100012842 is a wasteful number, since it uses less digits than its factorization.

100012842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67034 (or 67031 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 100012842 is about 10000.6420793867. The cubic root of 100012842 is about 464.1787516054.

Adding to 100012842 its reverse (248210001), we get a palindrome (348222843).

The spelling of 100012842 in words is "one hundred million, twelve thousand, eight hundred forty-two".