42629509 has 4 divisors (see below), whose sum is σ = 45908716. Its totient is φ = 39350304.

The previous prime is 42629501. The next prime is 42629519. The reversal of 42629509 is 90592624.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 7784100 + 34845409 = 2790^2 + 5903^2 .

It is a cyclic number.

It is not a de Polignac number, because 42629509 - 2³ = 42629501 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42629501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1639584 + ... + 1639609.

It is an arithmetic number, because the mean of its divisors is an integer number (11477179).

Almost surely, 2^42629509 is an apocalyptic number.

It is an amenable number.

42629509 is a deficient number, since it is larger than the sum of its proper divisors (3279207).

42629509 is a wasteful number, since it uses less digits than its factorization.

42629509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3279206.

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 42629509 is about 6529.1277365357. The cubic root of 42629509 is about 349.3307182717.

The spelling of 42629509 in words is "forty-two million, six hundred twenty-nine thousand, five hundred nine".