42170434 has 8 divisors (see below), whose sum is σ = 63283968. Its totient is φ = 21075780.

The previous prime is 42170407. The next prime is 42170449. The reversal of 42170434 is 43407124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 42170399 and 42170408.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4359 + ... + 10165.

It is an arithmetic number, because the mean of its divisors is an integer number (7910496).

Almost surely, 2^42170434 is an apocalyptic number.

42170434 is a deficient number, since it is larger than the sum of its proper divisors (21113534).

42170434 is a wasteful number, since it uses less digits than its factorization.

42170434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9440.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 42170434 is about 6493.8766542028. The cubic root of 42170434 is about 348.0722149424.

Adding to 42170434 its reverse (43407124), we get a palindrome (85577558).

The spelling of 42170434 in words is "forty-two million, one hundred seventy thousand, four hundred thirty-four".