42739765 has 8 divisors (see below), whose sum is σ = 53056440. Its totient is φ = 33012672.

The previous prime is 42739757. The next prime is 42739789. The reversal of 42739765 is 56793724.

It can be written as a sum of positive squares in 4 ways, for example, as 7396 + 42732369 = 86^2 + 6537^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42739765 - 2³ = 42739757 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147234 + ... + 147523.

It is an arithmetic number, because the mean of its divisors is an integer number (6632055).

Almost surely, 2^42739765 is an apocalyptic number.

It is an amenable number.

42739765 is a deficient number, since it is larger than the sum of its proper divisors (10316675).

42739765 is a wasteful number, since it uses less digits than its factorization.

42739765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294791.

The product of its digits is 317520, while the sum is 43.

The square root of 42739765 is about 6537.5656784464. The cubic root of 42739765 is about 349.6316260289.

The spelling of 42739765 in words is "forty-two million, seven hundred thirty-nine thousand, seven hundred sixty-five".