42942481 has 2 divisors, whose sum is σ = 42942482. Its totient is φ = 42942480.

The previous prime is 42942463. The next prime is 42942517. The reversal of 42942481 is 18424924.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26173456 + 16769025 = 5116^2 + 4095^2 .

It is a cyclic number.

It is not a de Polignac number, because 42942481 - 2¹³ = 42934289 is a prime.

It is a super-2 number, since 2×42942481² = 3688113348870722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42942401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21471240 + 21471241.

It is an arithmetic number, because the mean of its divisors is an integer number (21471241).

Almost surely, 2^42942481 is an apocalyptic number.

It is an amenable number.

42942481 is a deficient number, since it is larger than the sum of its proper divisors (1).

42942481 is an equidigital number, since it uses as much as digits as its factorization.

42942481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 34.

The square root of 42942481 is about 6553.0512740249. The cubic root of 42942481 is about 350.1835255187.

The spelling of 42942481 in words is "forty-two million, nine hundred forty-two thousand, four hundred eighty-one".