42034981 has 2 divisors, whose sum is σ = 42034982. Its totient is φ = 42034980.

The previous prime is 42034939. The next prime is 42034991. The reversal of 42034981 is 18943024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39262756 + 2772225 = 6266^2 + 1665^2 .

It is a cyclic number.

It is not a de Polignac number, because 42034981 - 2⁹ = 42034469 is a prime.

It is a super-2 number, since 2×42034981² = 3533879255340722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42034991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21017490 + 21017491.

It is an arithmetic number, because the mean of its divisors is an integer number (21017491).

Almost surely, 2^42034981 is an apocalyptic number.

It is an amenable number.

42034981 is a deficient number, since it is larger than the sum of its proper divisors (1).

42034981 is an equidigital number, since it uses as much as digits as its factorization.

42034981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 42034981 is about 6483.4389794306. The cubic root of 42034981 is about 347.6991415884.

The spelling of 42034981 in words is "forty-two million, thirty-four thousand, nine hundred eighty-one".