42775487 has 2 divisors, whose sum is σ = 42775488. Its totient is φ = 42775486.

The previous prime is 42775483. The next prime is 42775507. The reversal of 42775487 is 78457724.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42775487 - 2² = 42775483 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 (42775483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21387743 + 21387744.

It is an arithmetic number, because the mean of its divisors is an integer number (21387744).

Almost surely, 2^42775487 is an apocalyptic number.

42775487 is a deficient number, since it is larger than the sum of its proper divisors (1).

42775487 is an equidigital number, since it uses as much as digits as its factorization.

42775487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 439040, while the sum is 44.

The square root of 42775487 is about 6540.2971645025. The cubic root of 42775487 is about 349.7290065594.

The spelling of 42775487 in words is "forty-two million, seven hundred seventy-five thousand, four hundred eighty-seven".