42100161 has 4 divisors (see below), whose sum is σ = 56133552. Its totient is φ = 28066772.

The previous prime is 42100151. The next prime is 42100169. The reversal of 42100161 is 16100124.

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 42100161 - 2⁷ = 42100033 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42100161.

It is not an unprimeable number, because it can be changed into a prime (42100169) 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, 7016691 + ... + 7016696.

It is an arithmetic number, because the mean of its divisors is an integer number (14033388).

Almost surely, 2^42100161 is an apocalyptic number.

It is an amenable number.

42100161 is a deficient number, since it is larger than the sum of its proper divisors (14033391).

42100161 is a wasteful number, since it uses less digits than its factorization.

42100161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14033390.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 42100161 is about 6488.4636856501. The cubic root of 42100161 is about 347.8787644146.

Adding to 42100161 its reverse (16100124), we get a palindrome (58200285).

The spelling of 42100161 in words is "forty-two million, one hundred thousand, one hundred sixty-one".