42010815 has 32 divisors (see below), whose sum is σ = 83805696. Its totient is φ = 17458560.

The previous prime is 42010807. The next prime is 42010817. The reversal of 42010815 is 51801024.

It is not a de Polignac number, because 42010815 - 2³ = 42010807 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 42010791 and 42010800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42010817) 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 31 ways as a sum of consecutive naturals, for example, 17032 + ... + 19341.

It is an arithmetic number, because the mean of its divisors is an integer number (2618928).

Almost surely, 2^42010815 is an apocalyptic number.

42010815 is a deficient number, since it is larger than the sum of its proper divisors (41794881).

42010815 is a wasteful number, since it uses less digits than its factorization.

42010815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36399.

The product of its (nonzero) digits is 320, while the sum is 21.

The square root of 42010815 is about 6481.5750400655. The cubic root of 42010815 is about 347.6324978235.

Adding to 42010815 its reverse (51801024), we get a palindrome (93811839).

The spelling of 42010815 in words is "forty-two million, ten thousand, eight hundred fifteen".