42776087 has 4 divisors (see below), whose sum is σ = 45027480. Its totient is φ = 40524696.

The previous prime is 42776081. The next prime is 42776089. The reversal of 42776087 is 78067724.

42776087 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42776087 - 2¹⁰ = 42775063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42776081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1125668 + ... + 1125705.

It is an arithmetic number, because the mean of its divisors is an integer number (11256870).

Almost surely, 2^42776087 is an apocalyptic number.

42776087 is a deficient number, since it is larger than the sum of its proper divisors (2251393).

42776087 is a wasteful number, since it uses less digits than its factorization.

42776087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2251392.

The product of its (nonzero) digits is 131712, while the sum is 41.

The square root of 42776087 is about 6540.3430338171. The cubic root of 42776087 is about 349.7306417360.

The spelling of 42776087 in words is "forty-two million, seven hundred seventy-six thousand, eighty-seven".