42134681 has 2 divisors, whose sum is σ = 42134682. Its totient is φ = 42134680.

The previous prime is 42134671. The next prime is 42134693. The reversal of 42134681 is 18643124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 42133081 + 1600 = 6491^2 + 40^2 .

It is a cyclic number.

It is not a de Polignac number, because 42134681 - 2²² = 37940377 is a prime.

It is a super-2 number, since 2×42134681² = 3550662685943522, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42134621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21067340 + 21067341.

It is an arithmetic number, because the mean of its divisors is an integer number (21067341).

Almost surely, 2^42134681 is an apocalyptic number.

It is an amenable number.

42134681 is a deficient number, since it is larger than the sum of its proper divisors (1).

42134681 is an equidigital number, since it uses as much as digits as its factorization.

42134681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4608, while the sum is 29.

The square root of 42134681 is about 6491.1232464035. The cubic root of 42134681 is about 347.9738194291.

The spelling of 42134681 in words is "forty-two million, one hundred thirty-four thousand, six hundred eighty-one".