42539101 has 4 divisors (see below), whose sum is σ = 46406304. Its totient is φ = 38671900.

The previous prime is 42539093. The next prime is 42539111. The reversal of 42539101 is 10193524.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42539101 - 2³ = 42539093 is a prime.

It is a super-2 number, since 2×42539101² = 3619150227776402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42539111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1933585 + ... + 1933606.

It is an arithmetic number, because the mean of its divisors is an integer number (11601576).

Almost surely, 2^42539101 is an apocalyptic number.

It is an amenable number.

42539101 is a deficient number, since it is larger than the sum of its proper divisors (3867203).

42539101 is a wasteful number, since it uses less digits than its factorization.

42539101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3867202.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 42539101 is about 6522.2006255558. The cubic root of 42539101 is about 349.0835917697.

The spelling of 42539101 in words is "forty-two million, five hundred thirty-nine thousand, one hundred one".