100042505 has 8 divisors (see below), whose sum is σ = 126369600. Its totient is φ = 75821616.

The previous prime is 100042499. The next prime is 100042513. The reversal of 100042505 is 505240001.

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 100042505 - 2¹² = 100038409 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 526445 + ... + 526634.

It is an arithmetic number, because the mean of its divisors is an integer number (15796200).

Almost surely, 2^100042505 is an apocalyptic number.

It is an amenable number.

100042505 is a deficient number, since it is larger than the sum of its proper divisors (26327095).

100042505 is a wasteful number, since it uses less digits than its factorization.

100042505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053103.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 100042505 is about 10002.1250242136. The cubic root of 100042505 is about 464.2246376237.

Adding to 100042505 its reverse (505240001), we get a palindrome (605282506).

The spelling of 100042505 in words is "one hundred million, forty-two thousand, five hundred five".