42451085 has 4 divisors (see below), whose sum is σ = 50941308. Its totient is φ = 33960864.

The previous prime is 42451069. The next prime is 42451117. The reversal of 42451085 is 58015424.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 21921124 + 20529961 = 4682^2 + 4531^2 .

It is a cyclic number.

It is not a de Polignac number, because 42451085 - 2⁴ = 42451069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4245104 + ... + 4245113.

It is an arithmetic number, because the mean of its divisors is an integer number (12735327).

Almost surely, 2^42451085 is an apocalyptic number.

It is an amenable number.

42451085 is a deficient number, since it is larger than the sum of its proper divisors (8490223).

42451085 is an equidigital number, since it uses as much as digits as its factorization.

42451085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8490222.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 42451085 is about 6515.4497158677. The cubic root of 42451085 is about 348.8426671013.

The spelling of 42451085 in words is "forty-two million, four hundred fifty-one thousand, eighty-five".