42847291 has 2 divisors, whose sum is σ = 42847292. Its totient is φ = 42847290.

The previous prime is 42847283. The next prime is 42847313. The reversal of 42847291 is 19274824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42847291 - 2³ = 42847283 is a prime.

It is equal to p_2595925 and since 42847291 and 2595925 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42847291.

It is not a weakly prime, because it can be changed into another prime (42847201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21423645 + 21423646.

It is an arithmetic number, because the mean of its divisors is an integer number (21423646).

Almost surely, 2^42847291 is an apocalyptic number.

42847291 is a deficient number, since it is larger than the sum of its proper divisors (1).

42847291 is an equidigital number, since it uses as much as digits as its factorization.

42847291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 37.

The square root of 42847291 is about 6545.7842158140. The cubic root of 42847291 is about 349.9245851120.

The spelling of 42847291 in words is "forty-two million, eight hundred forty-seven thousand, two hundred ninety-one".