42170061 has 4 divisors (see below), whose sum is σ = 56226752. Its totient is φ = 28113372.

The previous prime is 42170053. The next prime is 42170077. The reversal of 42170061 is 16007124.

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 not a de Polignac number, because 42170061 - 2³ = 42170053 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 (42170021) 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, 7028341 + ... + 7028346.

It is an arithmetic number, because the mean of its divisors is an integer number (14056688).

Almost surely, 2^42170061 is an apocalyptic number.

It is an amenable number.

42170061 is a deficient number, since it is larger than the sum of its proper divisors (14056691).

42170061 is a wasteful number, since it uses less digits than its factorization.

42170061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14056690.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 42170061 is about 6493.8479347764. The cubic root of 42170061 is about 348.0711886996.

Adding to 42170061 its reverse (16007124), we get a palindrome (58177185).

The spelling of 42170061 in words is "forty-two million, one hundred seventy thousand, sixty-one".