42406415 has 12 divisors (see below), whose sum is σ = 54059016. Its totient is φ = 31928448.

The previous prime is 42406391. The next prime is 42406433. The reversal of 42406415 is 51460424.

It is not a de Polignac number, because 42406415 - 2¹⁴ = 42390031 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 11 ways as a sum of consecutive naturals, for example, 13229 + ... + 16118.

It is an arithmetic number, because the mean of its divisors is an integer number (4504918).

Almost surely, 2^42406415 is an apocalyptic number.

42406415 is a deficient number, since it is larger than the sum of its proper divisors (11652601).

42406415 is a wasteful number, since it uses less digits than its factorization.

42406415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29386 (or 29369 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 42406415 is about 6512.0208077063. The cubic root of 42406415 is about 348.7202652757.

Adding to 42406415 its reverse (51460424), we get a palindrome (93866839).

The spelling of 42406415 in words is "forty-two million, four hundred six thousand, four hundred fifteen".