42887771 has 4 divisors (see below), whose sum is σ = 43144752. Its totient is φ = 42630792.

The previous prime is 42887737. The next prime is 42887777. The reversal of 42887771 is 17778824.

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 42887771 - 2¹⁰ = 42886747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42887777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128240 + ... + 128573.

It is an arithmetic number, because the mean of its divisors is an integer number (10786188).

Almost surely, 2^42887771 is an apocalyptic number.

42887771 is a deficient number, since it is larger than the sum of its proper divisors (256981).

42887771 is a wasteful number, since it uses less digits than its factorization.

42887771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256980.

The product of its digits is 175616, while the sum is 44.

The square root of 42887771 is about 6548.8755523372. The cubic root of 42887771 is about 350.0347475706.

The spelling of 42887771 in words is "forty-two million, eight hundred eighty-seven thousand, seven hundred seventy-one".