42886661 has 2 divisors, whose sum is σ = 42886662. Its totient is φ = 42886660.

The previous prime is 42886639. The next prime is 42886709. The reversal of 42886661 is 16668824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29702500 + 13184161 = 5450^2 + 3631^2 .

It is a cyclic number.

It is not a de Polignac number, because 42886661 - 2¹⁰ = 42885637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42886601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21443330 + 21443331.

It is an arithmetic number, because the mean of its divisors is an integer number (21443331).

Almost surely, 2^42886661 is an apocalyptic number.

It is an amenable number.

42886661 is a deficient number, since it is larger than the sum of its proper divisors (1).

42886661 is an equidigital number, since it uses as much as digits as its factorization.

42886661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 110592, while the sum is 41.

The square root of 42886661 is about 6548.7908044157. The cubic root of 42886661 is about 350.0317277360.

The spelling of 42886661 in words is "forty-two million, eight hundred eighty-six thousand, six hundred sixty-one".