42842687 has 2 divisors, whose sum is σ = 42842688. Its totient is φ = 42842686.

The previous prime is 42842647. The next prime is 42842699. The reversal of 42842687 is 78624824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42842687 - 2¹² = 42838591 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42842617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21421343 + 21421344.

It is an arithmetic number, because the mean of its divisors is an integer number (21421344).

Almost surely, 2^42842687 is an apocalyptic number.

42842687 is a deficient number, since it is larger than the sum of its proper divisors (1).

42842687 is an equidigital number, since it uses as much as digits as its factorization.

42842687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 172032, while the sum is 41.

The square root of 42842687 is about 6545.4325296347. The cubic root of 42842687 is about 349.9120513713.

The spelling of 42842687 in words is "forty-two million, eight hundred forty-two thousand, six hundred eighty-seven".