42576881 has 2 divisors, whose sum is σ = 42576882. Its totient is φ = 42576880.

The previous prime is 42576851. The next prime is 42576883. The reversal of 42576881 is 18867524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39187600 + 3389281 = 6260^2 + 1841^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42576881 is a prime.

It is a super-2 number, since 2×42576881² = 3625581591376322, which contains 22 as substring.

Together with 42576883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42576883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21288440 + 21288441.

It is an arithmetic number, because the mean of its divisors is an integer number (21288441).

Almost surely, 2^42576881 is an apocalyptic number.

It is an amenable number.

42576881 is a deficient number, since it is larger than the sum of its proper divisors (1).

42576881 is an equidigital number, since it uses as much as digits as its factorization.

42576881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 107520, while the sum is 41.

The square root of 42576881 is about 6525.0962445009. The cubic root of 42576881 is about 349.1869043723.

The spelling of 42576881 in words is "forty-two million, five hundred seventy-six thousand, eight hundred eighty-one".