42496381 has 6 divisors (see below), whose sum is σ = 43912446. Its totient is φ = 41124600.

The previous prime is 42496373. The next prime is 42496393. The reversal of 42496381 is 18369424.

42496381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 42380100 + 116281 = 6510^2 + 341^2 .

It is not a de Polignac number, because 42496381 - 2³ = 42496373 is a prime.

It is a super-2 number, since 2×42496381² = 3611884796194322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42496381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42496681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21150 + ... + 23071.

It is an arithmetic number, because the mean of its divisors is an integer number (7318741).

Almost surely, 2^42496381 is an apocalyptic number.

It is an amenable number.

42496381 is a deficient number, since it is larger than the sum of its proper divisors (1416065).

42496381 is an equidigital number, since it uses as much as digits as its factorization.

42496381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44283 (or 44252 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 42496381 is about 6518.9248346641. The cubic root of 42496381 is about 348.9666966029.

The spelling of 42496381 in words is "forty-two million, four hundred ninety-six thousand, three hundred eighty-one".