42871617 has 12 divisors (see below), whose sum is σ = 62066004. Its totient is φ = 28516320.

The previous prime is 42871601. The next prime is 42871663. The reversal of 42871617 is 71617824.

It can be written as a sum of positive squares in 2 ways, for example, as 22810176 + 20061441 = 4776^2 + 4479^2 .

It is not a de Polignac number, because 42871617 - 2⁴ = 42871601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42871687) 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 11 ways as a sum of consecutive naturals, for example, 1018 + ... + 9315.

It is an arithmetic number, because the mean of its divisors is an integer number (5172167).

Almost surely, 2^42871617 is an apocalyptic number.

It is an amenable number.

42871617 is a deficient number, since it is larger than the sum of its proper divisors (19194387).

42871617 is a wasteful number, since it uses less digits than its factorization.

42871617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10800 (or 10797 counting only the distinct ones).

The product of its digits is 18816, while the sum is 36.

The square root of 42871617 is about 6547.6420946781. The cubic root of 42871617 is about 349.9907943157.

The spelling of 42871617 in words is "forty-two million, eight hundred seventy-one thousand, six hundred seventeen".