34170021 has 24 divisors (see below), whose sum is σ = 50450400. Its totient is φ = 22281696.

The previous prime is 34170013. The next prime is 34170041. The reversal of 34170021 is 12007143.

It is not a de Polignac number, because 34170021 - 2³ = 34170013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 34169976 and 34170003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34170041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111150 + ... + 111456.

It is an arithmetic number, because the mean of its divisors is an integer number (2102100).

Almost surely, 2^34170021 is an apocalyptic number.

It is an amenable number.

34170021 is a deficient number, since it is larger than the sum of its proper divisors (16280379).

34170021 is a wasteful number, since it uses less digits than its factorization.

34170021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545 (or 542 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 34170021 is about 5845.5128945200. The cubic root of 34170021 is about 324.5002845037.

Adding to 34170021 its reverse (12007143), we get a palindrome (46177164).

The spelling of 34170021 in words is "thirty-four million, one hundred seventy thousand, twenty-one".