321042439 has 2 divisors, whose sum is σ = 321042440. Its totient is φ = 321042438.

The previous prime is 321042427. The next prime is 321042443. The reversal of 321042439 is 934240123.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 321042439 - 2¹³ = 321034247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321442439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160521219 + 160521220.

It is an arithmetic number, because the mean of its divisors is an integer number (160521220).

Almost surely, 2^321042439 is an apocalyptic number.

321042439 is a deficient number, since it is larger than the sum of its proper divisors (1).

321042439 is an equidigital number, since it uses as much as digits as its factorization.

321042439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 321042439 is about 17917.6571850228. The cubic root of 321042439 is about 684.7323009588.

It can be divided in two parts, 32104 and 2439, that added together give a palindrome (34543).

The spelling of 321042439 in words is "three hundred twenty-one million, forty-two thousand, four hundred thirty-nine".