42631065 has 12 divisors (see below), whose sum is σ = 73893924. Its totient is φ = 22736544.

The previous prime is 42631063. The next prime is 42631081. The reversal of 42631065 is 56013624.

It can be written as a sum of positive squares in 2 ways, for example, as 24890121 + 17740944 = 4989^2 + 4212^2 .

It is not a de Polignac number, because 42631065 - 2¹ = 42631063 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42631063) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 473634 + ... + 473723.

It is an arithmetic number, because the mean of its divisors is an integer number (6157827).

Almost surely, 2^42631065 is an apocalyptic number.

42631065 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42631065 is a deficient number, since it is larger than the sum of its proper divisors (31262859).

42631065 is a wasteful number, since it uses less digits than its factorization.

42631065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 947368 (or 947365 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 42631065 is about 6529.2468937849. The cubic root of 42631065 is about 349.3349684730.

Adding to 42631065 its reverse (56013624), we get a palindrome (98644689).

The spelling of 42631065 in words is "forty-two million, six hundred thirty-one thousand, sixty-five".