42874991 has 2 divisors, whose sum is σ = 42874992. Its totient is φ = 42874990.

The previous prime is 42874987. The next prime is 42875033. The reversal of 42874991 is 19947824.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42874991 - 2² = 42874987 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42874961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21437495 + 21437496.

It is an arithmetic number, because the mean of its divisors is an integer number (21437496).

Almost surely, 2^42874991 is an apocalyptic number.

42874991 is a deficient number, since it is larger than the sum of its proper divisors (1).

42874991 is an equidigital number, since it uses as much as digits as its factorization.

42874991 is an evil number, because the sum of its binary digits is even.

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

The square root of 42874991 is about 6547.8997396112. The cubic root of 42874991 is about 349.9999755102. Note that the first 4 decimals are identical.

The spelling of 42874991 in words is "forty-two million, eight hundred seventy-four thousand, nine hundred ninety-one".