42090170 has 8 divisors (see below), whose sum is σ = 75762324. Its totient is φ = 16836064.

The previous prime is 42090131. The next prime is 42090197. The reversal of 42090170 is 7109024.

42090170 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 40921609 + 1168561 = 6397^2 + 1081^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2104499 + ... + 2104518.

Almost surely, 2^42090170 is an apocalyptic number.

42090170 is a deficient number, since it is larger than the sum of its proper divisors (33672154).

42090170 is a wasteful number, since it uses less digits than its factorization.

42090170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4209024.

The product of its (nonzero) digits is 504, while the sum is 23.

The square root of 42090170 is about 6487.6937350649. The cubic root of 42090170 is about 347.8512432870.

Adding to 42090170 its reverse (7109024), we get a palindrome (49199194).

The spelling of 42090170 in words is "forty-two million, ninety thousand, one hundred seventy".