42170465 has 8 divisors (see below), whose sum is σ = 51069480. Its totient is φ = 33426432.

The previous prime is 42170461. The next prime is 42170473. The reversal of 42170465 is 56407124.

It can be written as a sum of positive squares in 4 ways, for example, as 5058001 + 37112464 = 2249^2 + 6092^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 42170465 - 2² = 42170461 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42170461) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38144 + ... + 39233.

It is an arithmetic number, because the mean of its divisors is an integer number (6383685).

Almost surely, 2^42170465 is an apocalyptic number.

It is an amenable number.

42170465 is a deficient number, since it is larger than the sum of its proper divisors (8899015).

42170465 is a wasteful number, since it uses less digits than its factorization.

42170465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77491.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 42170465 is about 6493.8790410663. The cubic root of 42170465 is about 348.0723002331.

Adding to 42170465 its reverse (56407124), we get a palindrome (98577589).

The spelling of 42170465 in words is "forty-two million, one hundred seventy thousand, four hundred sixty-five".