42009290 has 16 divisors (see below), whose sum is σ = 75698280. Its totient is φ = 16785600.

The previous prime is 42009287. The next prime is 42009307. The reversal of 42009290 is 9290024.

It can be written as a sum of positive squares in 4 ways, for example, as 14645929 + 27363361 = 3827^2 + 5231^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11396 + ... + 14624.

Almost surely, 2^42009290 is an apocalyptic number.

42009290 is a deficient number, since it is larger than the sum of its proper divisors (33688990).

42009290 is a wasteful number, since it uses less digits than its factorization.

42009290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4537.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 42009290 is about 6481.4573978389. The cubic root of 42009290 is about 347.6282913989.

The spelling of 42009290 in words is "forty-two million, nine thousand, two hundred ninety".