42849971 has 8 divisors (see below), whose sum is σ = 43428000. Its totient is φ = 42275520.

The previous prime is 42849949. The next prime is 42849977. The reversal of 42849971 is 17994824.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42849971 is a prime.

It is a super-2 number, since 2×42849971² = 3672240029401682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42849977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29930 + ... + 31328.

It is an arithmetic number, because the mean of its divisors is an integer number (5428500).

Almost surely, 2^42849971 is an apocalyptic number.

42849971 is a deficient number, since it is larger than the sum of its proper divisors (578029).

42849971 is a wasteful number, since it uses less digits than its factorization.

42849971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1789.

The product of its digits is 145152, while the sum is 44.

The square root of 42849971 is about 6545.9889245247. The cubic root of 42849971 is about 349.9318806206.

The spelling of 42849971 in words is "forty-two million, eight hundred forty-nine thousand, nine hundred seventy-one".