42083281 has 2 divisors, whose sum is σ = 42083282. Its totient is φ = 42083280.

The previous prime is 42083273. The next prime is 42083287. The reversal of 42083281 is 18238024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35808256 + 6275025 = 5984^2 + 2505^2 .

It is a cyclic number.

It is not a de Polignac number, because 42083281 - 2³ = 42083273 is a prime.

It is a super-2 number, since 2×42083281² = 3542005079449922, which contains 22 as substring.

It is equal to p_2552338 and since 42083281 and 2552338 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (42083287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21041640 + 21041641.

It is an arithmetic number, because the mean of its divisors is an integer number (21041641).

Almost surely, 2^42083281 is an apocalyptic number.

It is an amenable number.

42083281 is a deficient number, since it is larger than the sum of its proper divisors (1).

42083281 is an equidigital number, since it uses as much as digits as its factorization.

42083281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 42083281 is about 6487.1627850702. The cubic root of 42083281 is about 347.8322643665.

The spelling of 42083281 in words is "forty-two million, eighty-three thousand, two hundred eighty-one".