42490481 has 12 divisors (see below), whose sum is σ = 48318900. Its totient is φ = 37292640.

The previous prime is 42490477. The next prime is 42490501. The reversal of 42490481 is 18409424.

It can be written as a sum of positive squares in 2 ways, for example, as 35808256 + 6682225 = 5984^2 + 2585^2 .

It is not a de Polignac number, because 42490481 - 2² = 42490477 is a prime.

It is a super-2 number, since 2×42490481² = 3610881951222722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42490421) 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 in 11 ways as a sum of consecutive naturals, for example, 2546 + ... + 9563.

It is an arithmetic number, because the mean of its divisors is an integer number (4026575).

Almost surely, 2^42490481 is an apocalyptic number.

It is an amenable number.

42490481 is a deficient number, since it is larger than the sum of its proper divisors (5828419).

42490481 is a wasteful number, since it uses less digits than its factorization.

42490481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12160 (or 12149 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 42490481 is about 6518.4722903453. The cubic root of 42490481 is about 348.9505462175.

The spelling of 42490481 in words is "forty-two million, four hundred ninety thousand, four hundred eighty-one".