42170620 has 12 divisors (see below), whose sum is σ = 88558344. Its totient is φ = 16868240.

The previous prime is 42170599. The next prime is 42170627. The reversal of 42170620 is 2607124.

It is a super-2 number, since 2×42170620² = 3556722382368800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42170591 and 42170600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42170627) 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, 1054246 + ... + 1054285.

It is an arithmetic number, because the mean of its divisors is an integer number (7379862).

Almost surely, 2^42170620 is an apocalyptic number.

It is an amenable number.

42170620 is an abundant number, since it is smaller than the sum of its proper divisors (46387724).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42170620 is a wasteful number, since it uses less digits than its factorization.

42170620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2108540 (or 2108538 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 42170620 is about 6493.8909753706. The cubic root of 42170620 is about 348.0727266859.

Adding to 42170620 its reverse (2607124), we get a palindrome (44777744).

The spelling of 42170620 in words is "forty-two million, one hundred seventy thousand, six hundred twenty".