42032309 has 4 divisors (see below), whose sum is σ = 45853440. Its totient is φ = 38211180.

The previous prime is 42032299. The next prime is 42032323. The reversal of 42032309 is 90323024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42032309 - 2¹⁶ = 41966773 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42032359) 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, 1910549 + ... + 1910570.

It is an arithmetic number, because the mean of its divisors is an integer number (11463360).

Almost surely, 2^42032309 is an apocalyptic number.

It is an amenable number.

42032309 is a deficient number, since it is larger than the sum of its proper divisors (3821131).

42032309 is a wasteful number, since it uses less digits than its factorization.

42032309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3821130.

The product of its (nonzero) digits is 1296, while the sum is 23.

The square root of 42032309 is about 6483.2329126756. The cubic root of 42032309 is about 347.6917741389.

The spelling of 42032309 in words is "forty-two million, thirty-two thousand, three hundred nine".