42765387 has 48 divisors (see below), whose sum is σ = 71327520. Its totient is φ = 22643712.

The previous prime is 42765367. The next prime is 42765403. The reversal of 42765387 is 78356724.

It is not a de Polignac number, because 42765387 - 2⁷ = 42765259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42765367) 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 47 ways as a sum of consecutive naturals, for example, 272313 + ... + 272469.

It is an arithmetic number, because the mean of its divisors is an integer number (1485990).

Almost surely, 2^42765387 is an apocalyptic number.

42765387 is a deficient number, since it is larger than the sum of its proper divisors (28562133).

42765387 is a wasteful number, since it uses less digits than its factorization.

42765387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300 (or 293 counting only the distinct ones).

The product of its digits is 282240, while the sum is 42.

The square root of 42765387 is about 6539.5249827491. The cubic root of 42765387 is about 349.7014787917.

The spelling of 42765387 in words is "forty-two million, seven hundred sixty-five thousand, three hundred eighty-seven".