100042785 has 24 divisors (see below), whose sum is σ = 174567744. Its totient is φ = 52999200.

The previous prime is 100042781. The next prime is 100042843. The reversal of 100042785 is 587240001.

It is not a de Polignac number, because 100042785 - 2² = 100042781 is a prime.

It is not an unprimeable number, because it can be changed into a prime (100042781) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 567 + ... + 14156.

It is an arithmetic number, because the mean of its divisors is an integer number (7273656).

Almost surely, 2^100042785 is an apocalyptic number.

100042785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

100042785 is a deficient number, since it is larger than the sum of its proper divisors (74524959).

100042785 is a wasteful number, since it uses less digits than its factorization.

100042785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14885 (or 14882 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 27.

The square root of 100042785 is about 10002.1390212294. The cubic root of 100042785 is about 464.2250707155.

Adding to 100042785 its reverse (587240001), we get a palindrome (687282786).

The spelling of 100042785 in words is "one hundred million, forty-two thousand, seven hundred eighty-five".