42727815 has 24 divisors (see below), whose sum is σ = 79759680. Its totient is φ = 21034944.

The previous prime is 42727807. The next prime is 42727823. The reversal of 42727815 is 51872724.

It is an interprime number because it is at equal distance from previous prime (42727807) and next prime (42727823).

It is not a de Polignac number, because 42727815 - 2³ = 42727807 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42727815.

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, 35935 + ... + 37104.

It is an arithmetic number, because the mean of its divisors is an integer number (3323320).

Almost surely, 2^42727815 is an apocalyptic number.

42727815 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

42727815 is a deficient number, since it is larger than the sum of its proper divisors (37031865).

42727815 is a wasteful number, since it uses less digits than its factorization.

42727815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73063 (or 73060 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 42727815 is about 6536.6516657995. The cubic root of 42727815 is about 349.5990374284.

The spelling of 42727815 in words is "forty-two million, seven hundred twenty-seven thousand, eight hundred fifteen".