42321739 has 4 divisors (see below), whose sum is σ = 43015600. Its totient is φ = 41627880.

The previous prime is 42321731. The next prime is 42321749. The reversal of 42321739 is 93712324.

42321739 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 42321739 - 2³ = 42321731 is a prime.

It is a super-2 number, since 2×42321739² = 3582259183968242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42321739.

It is not an unprimeable number, because it can be changed into a prime (42321731) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 346839 + ... + 346960.

It is an arithmetic number, because the mean of its divisors is an integer number (10753900).

Almost surely, 2^42321739 is an apocalyptic number.

42321739 is a deficient number, since it is larger than the sum of its proper divisors (693861).

42321739 is an equidigital number, since it uses as much as digits as its factorization.

42321739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693860.

The product of its digits is 9072, while the sum is 31.

The square root of 42321739 is about 6505.5160440967. The cubic root of 42321739 is about 348.4880055045.

The spelling of 42321739 in words is "forty-two million, three hundred twenty-one thousand, seven hundred thirty-nine".