42009146 has 8 divisors (see below), whose sum is σ = 63049620. Its totient is φ = 20992608.

The previous prime is 42009131. The next prime is 42009169. The reversal of 42009146 is 64190024.

It can be written as a sum of positive squares in 2 ways, for example, as 41925625 + 83521 = 6475^2 + 289^2 .

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

It is a Curzon number.

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, 641 + ... + 9188.

Almost surely, 2^42009146 is an apocalyptic number.

42009146 is a deficient number, since it is larger than the sum of its proper divisors (21040474).

42009146 is a wasteful number, since it uses less digits than its factorization.

42009146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11968.

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 42009146 is about 6481.4462892166. The cubic root of 42009146 is about 347.6278941968.

The spelling of 42009146 in words is "forty-two million, nine thousand, one hundred forty-six".