42117447 has 16 divisors (see below), whose sum is σ = 57075840. Its totient is φ = 27622752.

The previous prime is 42117409. The next prime is 42117469. The reversal of 42117447 is 74471124.

It is not a de Polignac number, because 42117447 - 2¹⁰ = 42116423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42107447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57093 + ... + 57825.

It is an arithmetic number, because the mean of its divisors is an integer number (3567240).

Almost surely, 2^42117447 is an apocalyptic number.

42117447 is a deficient number, since it is larger than the sum of its proper divisors (14958393).

42117447 is a wasteful number, since it uses less digits than its factorization.

42117447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1022.

The product of its digits is 6272, while the sum is 30.

The square root of 42117447 is about 6489.7956054101. The cubic root of 42117447 is about 347.9263700084.

The spelling of 42117447 in words is "forty-two million, one hundred seventeen thousand, four hundred forty-seven".