42812865 has 24 divisors (see below), whose sum is σ = 75154560. Its totient is φ = 22542624.

The previous prime is 42812857. The next prime is 42812873. The reversal of 42812865 is 56821824.

It is an interprime number because it is at equal distance from previous prime (42812857) and next prime (42812873).

It is not a de Polignac number, because 42812865 - 2³ = 42812857 is a prime.

It is a Curzon 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 23 ways as a sum of consecutive naturals, for example, 2467 + ... + 9576.

It is an arithmetic number, because the mean of its divisors is an integer number (3131440).

Almost surely, 2^42812865 is an apocalyptic number.

42812865 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

42812865 is a deficient number, since it is larger than the sum of its proper divisors (32341695).

42812865 is a wasteful number, since it uses less digits than its factorization.

42812865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12133 (or 12130 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 42812865 is about 6543.1540559580. The cubic root of 42812865 is about 349.8308434291.

The spelling of 42812865 in words is "forty-two million, eight hundred twelve thousand, eight hundred sixty-five".