42102001 has 4 divisors (see below), whose sum is σ = 42278400. Its totient is φ = 41925604.

The previous prime is 42101993. The next prime is 42102019. The reversal of 42102001 is 10020124.

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 42102001 - 2³ = 42101993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42102091) 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, 87841 + ... + 88318.

It is an arithmetic number, because the mean of its divisors is an integer number (10569600).

Almost surely, 2^42102001 is an apocalyptic number.

It is an amenable number.

42102001 is a deficient number, since it is larger than the sum of its proper divisors (176399).

42102001 is a wasteful number, since it uses less digits than its factorization.

42102001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176398.

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 42102001 is about 6488.6054742140. The cubic root of 42102001 is about 347.8838323889.

Adding to 42102001 its reverse (10020124), we get a palindrome (52122125).

The spelling of 42102001 in words is "forty-two million, one hundred two thousand, one".