42191285 has 8 divisors (see below), whose sum is σ = 51998136. Its totient is φ = 32840640.

The previous prime is 42191273. The next prime is 42191291. The reversal of 42191285 is 58219124.

42191285 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 4 ways, for example, as 19704721 + 22486564 = 4439^2 + 4742^2 .

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

It is not a de Polignac number, because 42191285 - 2⁶ = 42191221 is a prime.

It is a Duffinian number.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 113846 + ... + 114215.

It is an arithmetic number, because the mean of its divisors is an integer number (6499767).

Almost surely, 2^42191285 is an apocalyptic number.

It is an amenable number.

42191285 is a deficient number, since it is larger than the sum of its proper divisors (9806851).

42191285 is a wasteful number, since it uses less digits than its factorization.

42191285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 228103.

The product of its digits is 5760, while the sum is 32.

The square root of 42191285 is about 6495.4818912841. The cubic root of 42191285 is about 348.1295731215.

The spelling of 42191285 in words is "forty-two million, one hundred ninety-one thousand, two hundred eighty-five".