100042511 has 4 divisors (see below), whose sum is σ = 100472112. Its totient is φ = 99612912.

The previous prime is 100042499. The next prime is 100042513. The reversal of 100042511 is 115240001.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 100042511 - 2⁶ = 100042447 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100042513) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214451 + ... + 214916.

It is an arithmetic number, because the mean of its divisors is an integer number (25118028).

Almost surely, 2^100042511 is an apocalyptic number.

100042511 is a deficient number, since it is larger than the sum of its proper divisors (429601).

100042511 is an equidigital number, since it uses as much as digits as its factorization.

100042511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429600.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 100042511 is about 10002.1253241499. The cubic root of 100042511 is about 464.2246469042.

Adding to 100042511 its reverse (115240001), we get a palindrome (215282512).

The spelling of 100042511 in words is "one hundred million, forty-two thousand, five hundred eleven".