42686415 has 24 divisors (see below), whose sum is σ = 74297808. Its totient is φ = 22671360.

The previous prime is 42686383. The next prime is 42686431. The reversal of 42686415 is 51468624.

42686415 is a `hidden beast` number, since 4 + 2 + 6 + 8 + 641 + 5 = 666.

It is not a de Polignac number, because 42686415 - 2⁵ = 42686383 is a prime.

It is a super-3 number, since 3×42686415³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42686415.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9720 + ... + 13410.

It is an arithmetic number, because the mean of its divisors is an integer number (3095742).

Almost surely, 2^42686415 is an apocalyptic number.

42686415 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

42686415 is a deficient number, since it is larger than the sum of its proper divisors (31611393).

42686415 is a wasteful number, since it uses less digits than its factorization.

42686415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3959 (or 3956 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 42686415 is about 6533.4841394160. The cubic root of 42686415 is about 349.4860893234.

The spelling of 42686415 in words is "forty-two million, six hundred eighty-six thousand, four hundred fifteen".