42640759 has 8 divisors (see below), whose sum is σ = 50412960. Its totient is φ = 35288736.

The previous prime is 42640757. The next prime is 42640771. The reversal of 42640759 is 95704624.

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

It is not a de Polignac number, because 42640759 - 2¹ = 42640757 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a nialpdrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42640753) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104824 + ... + 105229.

It is an arithmetic number, because the mean of its divisors is an integer number (6301620).

Almost surely, 2^42640759 is an apocalyptic number.

42640759 is a deficient number, since it is larger than the sum of its proper divisors (7772201).

42640759 is a wasteful number, since it uses less digits than its factorization.

42640759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210089.

The product of its (nonzero) digits is 60480, while the sum is 37.

The square root of 42640759 is about 6529.9892036664. The cubic root of 42640759 is about 349.3614452260.

The spelling of 42640759 in words is "forty-two million, six hundred forty thousand, seven hundred fifty-nine".