42170445 has 12 divisors (see below), whose sum is σ = 73095516. Its totient is φ = 22490880.

The previous prime is 42170407. The next prime is 42170449. The reversal of 42170445 is 54407124.

42170445 is a `hidden beast` number, since 4 + 217 + 0 + 445 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4384836 + 37785609 = 2094^2 + 6147^2 .

It is not a de Polignac number, because 42170445 - 2⁸ = 42170189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42170449) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 468516 + ... + 468605.

It is an arithmetic number, because the mean of its divisors is an integer number (6091293).

Almost surely, 2^42170445 is an apocalyptic number.

42170445 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42170445 is a deficient number, since it is larger than the sum of its proper divisors (30925071).

42170445 is a wasteful number, since it uses less digits than its factorization.

42170445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937132 (or 937129 counting only the distinct ones).

The product of its (nonzero) digits is 4480, while the sum is 27.

The square root of 42170445 is about 6493.8775011545. The cubic root of 42170445 is about 348.0722452069.

Adding to 42170445 its reverse (54407124), we get a palindrome (96577569).

The spelling of 42170445 in words is "forty-two million, one hundred seventy thousand, four hundred forty-five".