42040667 has 2 divisors, whose sum is σ = 42040668. Its totient is φ = 42040666.

The previous prime is 42040637. The next prime is 42040679. The reversal of 42040667 is 76604024.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42040667 is a prime.

It is not a weakly prime, because it can be changed into another prime (42040637) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21020333 + 21020334.

It is an arithmetic number, because the mean of its divisors is an integer number (21020334).

Almost surely, 2^42040667 is an apocalyptic number.

42040667 is a deficient number, since it is larger than the sum of its proper divisors (1).

42040667 is an equidigital number, since it uses as much as digits as its factorization.

42040667 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 42040667 is about 6483.8774664548. The cubic root of 42040667 is about 347.7148184376.

The spelling of 42040667 in words is "forty-two million, forty thousand, six hundred sixty-seven".