42039321 has 4 divisors (see below), whose sum is σ = 56052432. Its totient is φ = 28026212.

The previous prime is 42039311. The next prime is 42039323. The reversal of 42039321 is 12393024.

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 42039321 - 2⁹ = 42038809 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42039291 and 42039300.

It is not an unprimeable number, because it can be changed into a prime (42039323) 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, 7006551 + ... + 7006556.

It is an arithmetic number, because the mean of its divisors is an integer number (14013108).

Almost surely, 2^42039321 is an apocalyptic number.

It is an amenable number.

42039321 is a deficient number, since it is larger than the sum of its proper divisors (14013111).

42039321 is a wasteful number, since it uses less digits than its factorization.

42039321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14013110.

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 42039321 is about 6483.7736697081. The cubic root of 42039321 is about 347.7111075138.

The spelling of 42039321 in words is "forty-two million, thirty-nine thousand, three hundred twenty-one".