42191290 has 16 divisors (see below), whose sum is σ = 76043520. Its totient is φ = 16854480.

The previous prime is 42191273. The next prime is 42191291. The reversal of 42191290 is 9219124.

It is a happy number.

42191290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (42191291) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 6895 + ... + 11485.

It is an arithmetic number, because the mean of its divisors is an integer number (4752720).

Almost surely, 2^42191290 is an apocalyptic number.

42191290 is a deficient number, since it is larger than the sum of its proper divisors (33852230).

42191290 is a wasteful number, since it uses less digits than its factorization.

42191290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5517.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 42191290 is about 6495.4822761670. The cubic root of 42191290 is about 348.1295868735.

The spelling of 42191290 in words is "forty-two million, one hundred ninety-one thousand, two hundred ninety".