42142101 has 4 divisors (see below), whose sum is σ = 56189472. Its totient is φ = 28094732.

The previous prime is 42142091. The next prime is 42142151. The reversal of 42142101 is 10124124.

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 42142101 - 2⁵ = 42142069 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42142151) 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, 7023681 + ... + 7023686.

It is an arithmetic number, because the mean of its divisors is an integer number (14047368).

Almost surely, 2^42142101 is an apocalyptic number.

It is an amenable number.

42142101 is a deficient number, since it is larger than the sum of its proper divisors (14047371).

42142101 is a wasteful number, since it uses less digits than its factorization.

42142101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14047370.

The product of its (nonzero) digits is 64, while the sum is 15.

The square root of 42142101 is about 6491.6947710132. The cubic root of 42142101 is about 347.9942445210.

Adding to 42142101 its reverse (10124124), we get a palindrome (52266225).

The spelling of 42142101 in words is "forty-two million, one hundred forty-two thousand, one hundred one".